Skip to main content
Sony VAIO · Laptop RAM Replacement Service · Sheetal Nagar

Sony VAIO
Laptop RAM Replacement Service
in Sheetal Nagar

Professional Laptop RAM Replacement Service for your Sony VAIO laptop or computer in Sheetal Nagar. Experienced technicians, OEM-grade parts & 90-day warranty.

✓ Experienced Technicians ✓ Free Doorstep Pickup ✓ Same-Day Service ✓ 90-Day Warranty ✓ OEM Quality Parts

Open 9 AM – 9 PM · 7 days · Free pickup from Sheetal Nagar & nearby areas

Technician working inside an opened laptop with RAM modules and an SSD laid out beside it Technician with a screwdriver over an opened laptop, RAM modules and hard drives on the repair mat
Xigox technicians at the repair bench
What's Included

What Our Sony VAIO Laptop RAM Replacement Service Covers

Everything included in your Sony VAIO Laptop RAM Replacement Service service at Xigox Sheetal Nagar

Verified Speed Boost

Benchmark tests confirm performance improvements after SSD/RAM upgrade on your Sony VAIO laptop.

Data Migration Included

All your existing data is safely cloned and transferred to the new SSD — no reinstallation needed.

90-Day Upgrade Warranty

90-day warranty on all hardware upgrades. New component failure covered completely.

OS Compatibility Check

Windows, macOS or Linux compatibility verified post-upgrade. Drivers installed if needed.

Same-Day Service

Most Sony VAIO SSD/RAM upgrades completed the same day — typically 1–2 hours.

Performance Report

Before/after performance comparison provided so you can see the real-world improvement.

All Work Backed by 90-Day Warranty

Free re-repair within 90 days if the same issue recurs. No questions asked.

Book This Service
Why It Matters

Why Professional Sony VAIO Laptop RAM Replacement Service Makes a Difference

Understand why expert service protects your Sony VAIO laptop or computer and extends its lifespan

Restore Full Performance

Professional Laptop RAM Replacement Service restores your Sony VAIO Laptop to its intended performance level.

Prevent Future Damage

Addressing repair needs early prevents minor issues from escalating into major hardware failures.

Cost-Effective Solution

Repair is significantly cheaper than replacement. We maximise your Sony VAIO laptop's useful lifespan.

Expert Brand Knowledge

Our technicians are trained specifically on Sony VAIO hardware quirks, ensuring precise and lasting repairs.

Service Pricing

Sony VAIO Laptop RAM Replacement Service Cost in Sheetal Nagar

Transparent pricing · No hidden fees · Pay only after service is complete

ServiceEstimated CostWarranty
4GB RAM Upgrade ₹2,999 - ₹3,999 90 Days
4GB RAM Upgrade ₹2,999 - ₹3,999 90 Days
4GB RAM Upgrade ₹2,999 - ₹3,999 90 Days
4GB RAM Upgrade ₹2,999 - ₹3,999 90 Days
4GB RAM Upgrade ₹2,999 - ₹3,999 90 Days
4GB RAM Upgrade ₹2,999 - ₹3,999 90 Days

Final quote provided after free laptop or computer inspection. Work starts only with your approval.

Get Exact Quote

Why Us?

Why Choose Xigox for Sony VAIO Laptop RAM Replacement Service in Sheetal Nagar?

With 1,00,305+ successful repairs and a 4.9-star rating, Xigox is an independent Sony VAIO repair specialist serving Sheetal Nagar. Serving all addresses in the 401107 postal zone.

No Fix, No Repair Fee

If we cannot resolve your Sony VAIO Laptop RAM Replacement Service issue, you pay nothing beyond the inspection fee.

Component-Level Repairs

We repair Sony VAIO hardware at chip and board level where it's safe to do so — often a fraction of a full-module swap.

Experienced Technicians

Our engineers work on Sony VAIO hardware regularly. Every repair is tested before return.

Genuine & OEM-Grade Parts

We use genuine Sony VAIO parts wherever available; otherwise OEM-compatible components.

90-Day Parts Warranty

Every repair backed by a written 90-day warranty. Same fault recurs? We fix it free of charge.

Same-Day Turnaround

Most Sony VAIO Laptop RAM Replacement Service jobs in Sheetal Nagar are completed same-day. Urgent service available for critical cases.

Repairs Completed
1,00,305+
Since 2011
Average Rating
4.9 ★
9,605+ reviews
Repair Warranty
90 Days
Parts & labour
Avg Response
30 Min
For common issues
Pickup & Drop
Free
₹350 inspection fee
Est. Since
2011
15+ yrs in Thane

Who repairs your device

Repaired in-house by Xigox technicians

Your Sony VAIO is handled by Xigox technicians from start to finish. It is never handed on to another shop. Work that needs the repair bench is done at our workshop in Virar West.

Board-level faults are traced with a microscope, a multimeter and a soldering station before any part is replaced, and parts are fitted only after you approve the quote.

We don't open your personal files during a repair. When a job needs access to your data, such as data recovery or a Windows reinstall, we ask you first.

  • Repaired in-house, not outsourced
  • Quote approved by you before work starts
  • Your files stay private
  • Microscope and board-level tools
  • Genuine or OEM-grade parts
  • 90-day warranty on repairs
Technician inspecting a laptop motherboard under a microscope at the repair bench Technician testing a laptop mainboard with a multimeter beside a Xigox-branded monitor Technician brushing dust off an opened laptop motherboard with a cleaning brush Technician inspecting a laptop motherboard under a microscope at the repair bench
Xigox technicians at the repair bench.
Service Process

How We Deliver Sony VAIO Laptop RAM Replacement Service

From booking to delivery — transparent, efficient, and professional every step of the way

Book Service

Call, WhatsApp or book online. Tell us you need Laptop RAM Replacement Service for your Sony VAIO laptop or computer in Sheetal Nagar. We'll confirm within minutes.

Free Doorstep Pickup

An experienced technician picks up your Sony VAIO laptop or computer from your Sheetal Nagar address at no cost. No travel required.

₹350 Inspection (refunded if you proceed with repair)

Your Sony VAIO laptop or computer is assessed by a specialist trained on Sony VAIO hardware. Full written inspection report — ₹350 fee refunded if you proceed with repair.

Transparent Quote

We provide a detailed repair quote for Laptop RAM Replacement Service. Work only starts after your explicit written approval — no hidden charges ever.

Expert Repair

Our Sony VAIO specialists perform Laptop RAM Replacement Service using OEM-grade parts and professional-grade tools. multi-point quality check included.

90-Day Warranty + Delivery

Your Sony VAIO laptop or computer is returned to your Sheetal Nagar address with a written 90-day warranty. If the same issue recurs, we fix it free.

Customer reviews

What Customers Say About Laptop & Computer Repairs in Sheetal Nagar

4.9/5 · 1 reviews shown

See all 9,605+ reviews

Fujitsu laptop — Fujitsu Virus Removal

“Booked Fujitsu Virus Removal for my Fujitsu laptop online. Doorstep pickup and clear communication throughout.”

Xigox reply: Thank you for trusting Xigox with your Fujitsu repair.

P Priya Menon Chembur · 15 Jul 2026 10

Repair examples

Recently Repaired Laptops

View All Recent Repairs

Lenovo

ThinkPad E14

Fixed
Issue
Multiple keys not responding after tea spill. Keyboard backlight also stopped working.
Solution
Replaced full keyboard module with backlit variant. Cleaned internal membrane and tested all keys.

Technician's note

Tea had corroded the membrane. Internal components were safe from further damage.

Thane West 1.5 Hours
  • Keyboard
  • Lenovo
  • Spill

HP

Pavilion Gaming

Fixed
Issue
Blue screen errors, random crashes during gaming.
Solution
Diagnosed RAM failure. Replaced faulty memory modules.
Borivali West 1 Hours
  • RAM
  • HP
  • Gaming

Acer

Aspire 5 A515

Fixed
Issue
Laptop extremely slow with original 1TB HDD. Boot time over 3 minutes.
Solution
Upgraded to 512GB NVMe SSD. Cloned all data. Installed fresh Windows 11 with drivers. Boot time reduced to 8 seconds.

Technician's note

HDD was healthy — kept as secondary storage. Massive performance improvement.

Dadar West 2 Hours
  • SSD
  • Acer
  • Upgrade

HP

Pavilion x360

Fixed
Issue
Right hinge broken, screen wobbling. Back panel cracked near hinge mount.
Solution
Replaced both hinges with reinforced metal hinges. Repaired back panel crack with epoxy bonding.

Technician's note

Common issue in x360 convertible models. Both hinges replaced for balanced tension.

Goregaon West 2 Hours
  • Hinge
  • HP
  • Convertible

Dell

Latitude 5430

Fixed
Issue
Battery draining from 100% to 0% in 45 minutes. Dell diagnostics showing battery wear 85%.
Solution
Replaced battery with genuine Dell cell. Calibrated battery controller. Restored to 7+ hours backup.

Technician's note

Corporate laptop with heavy daily use. Battery had exceeded 800 charge cycles.

Borivali West 45 Minutes
  • Battery
  • Dell
  • Corporate

MacBook

Air M2

Fixed
Issue
Water spilled on keyboard. Laptop dead, no response to charger. Corrosion visible on logic board.
Solution
Ultrasonic cleaning of logic board. Replaced 2 corroded ICs and damaged keyboard flex cable. Full functionality restored.

Technician's note

Water had not reached SSD — all data intact. Board-level repair saved customer from logic board replacement.

Malad West 6 Hours
  • Water Damage
  • MacBook
  • Board Repair

FAQ

FAQs — Sony VAIO Laptop RAM Replacement Service in Sheetal Nagar

Everything you need to know before booking your service

10 questions answered

Booking is simple: WhatsApp or call +91 74997 61196, describe your laptop issue, receive a free quote, and schedule a convenient pickup time in Sheetal Nagar. We're available 9 AM–9 PM, 7 days a week — including weekends and public holidays. Customers near LT Road in Sheetal Nagar are covered by our free pickup.
Yes! Xigox offers same-day Sony VAIO Laptop RAM Replacement Service for most common issues in Sheetal Nagar. We pick up your laptop in the morning, repair it at our workshop, and deliver it back by evening. Same-day service applies to screen replacements, battery changes, software repairs, and more. Our service covers the full 401107 postal area in Sheetal Nagar.
Absolutely. Data security is our top priority. Our technicians never access personal files during Sony VAIO Laptop RAM Replacement Service. We follow strict protocols to prevent data loss, and we'll always inform you before any procedure that could affect stored data. Your privacy is fully protected. Customers across Sheetal Nagar (401107) enjoy priority same-day scheduling.
Xigox handles Sony VAIO Laptop RAM Replacement Service for all major brands in Sheetal Nagar, including Apple, Dell, HP, Lenovo, Asus, Acer, MSI, Microsoft, Samsung and Toshiba — and many more. No brand or model is too complex — we repair them all. Our service covers the full 401107 postal area in Sheetal Nagar.
Yes — ₹350 for the inspection in Sheetal Nagar. Our technician diagnoses your laptop and gives you a clear written estimate; if you go ahead with the repair, that ₹350 is adjusted against the total cost, so the inspection itself doesn't add to the bill. If you decide not to proceed, the ₹350 still applies for the technician's time. Customers near LT Road in Sheetal Nagar are covered by our free pickup.
We accept all major payment methods for Sony VAIO Laptop RAM Replacement Service in Sheetal Nagar: UPI (Google Pay, PhonePe, Paytm), debit/credit cards, net banking, and cash. Payment is collected after the repair is completed to your satisfaction — we never charge upfront without consent. We've been serving Thane district for over 15 years.
Yes — out-of-warranty laptops are most of what we handle in Sheetal Nagar. Once the manufacturer warranty lapses, authorised centres often quote near-replacement prices for a single component. We repair at component level where it is safe to do so, which is usually a fraction of that cost, and back it with our own 90-day warranty. Customers across Sheetal Nagar (401107) enjoy priority same-day scheduling.
You pay nothing beyond the ₹350 inspection. If we cannot resolve the fault, we explain exactly what we found, return your laptop in the condition we received it, and — where the economics do not justify a repair — tell you so plainly rather than selling you work that is not worth doing. We also serve Naya Nagar, Jesal Park, Beverly Park, so you can recommend us to neighbours too.
For software faults, setup, upgrades and diagnostics we can work on-site anywhere in Sheetal Nagar. Component-level work — board repair, screen bonding, liquid-damage recovery — needs workshop equipment, so we collect the laptop, repair it, and return it. Both options are free of travel charges. We've been serving Thane district for over 15 years.
We send live updates over WhatsApp at each stage: collection, diagnosis, quote approval, repair completion, and dispatch. You can reply to that thread at any point to reach the technician handling your laptop rather than a general helpline. Our service covers the full 401107 postal area in Sheetal Nagar.

Still have questions?

Send us your question on WhatsApp or call — a technician will answer.

Sony VAIO Laptop Repair in Sheetal Nagar — Xigox

Xigox is Sheetal Nagar's leading independent specialist for Sony VAIO Laptop repair. Our engineers are not generalists — they undergo dedicated training on Sony VAIO hardware, firmware and diagnostics. Since 2011, we have completed over 1,00,000+ repairs across all Sony VAIO product lines, earning a 4.9-star average customer rating.

Parts for Sony VAIO Laptop models are held in stock rather than ordered after you book, so most repairs are not waiting on a supplier. Screens, batteries, keyboards, charging boards and flex cables are all OEM-grade. You approve a written estimate first, and the ₹350 inspection is credited back against the repair.

We actively serve the entire 401107 postal area within Thane district, ensuring same-day response for every repair request. ₹350 inspection fee (refunded if you proceed with repair). Located near LT Road, our service coverage extends across Sheetal Nagar and all surrounding localities. In addition to Sheetal Nagar, we also provide doorstep repairs and free pickup for lab work for customers in Naya Nagar, Jesal Park, Beverly Park and other nearby areas.

Straightforward Sony VAIO jobs — battery, keyboard, screen, SSD or RAM — are done at your address in Sheetal Nagar. Anything needing the microscope and hot-air station comes back to the lab, with free pickup and drop either way. We confirm within 15 minutes of booking and tell you honestly whether it is a same-day fix.

Your Sony VAIO Laptop leaves with a written 90-day warranty covering both parts and labour. Same fault back inside that window and we redo it free — no argument, no diagnostic fee. WhatsApp support stays open afterwards for any question about the repair.

Service Hours

Monday – Sunday · 9 AM – 9 PM

Open on all public holidays

Service Area

Sheetal Nagar & surrounding Mumbai areas

Doorstep repairs + free pickup for lab work

Contact Us

+91 74997 61196

info@xigox.com

Our Guarantee

90-day warranty on all repairs

Free re-repair if same fault recurs

Product lines

Sony VAIO Models We Repair for Laptop RAM Replacement Service in Sheetal Nagar

At our bench we handle Laptop RAM Replacement Service on the Sony VAIO VAIO range; the models are listed below.

Sony VAIO VAIO

The VAIO E Series is part of Sony/VAIO's E Series — an accessible, mainstream laptop line from the VAIO brand's history.

VAIO E Series

Laptop RAM Replacement Service for All Sony VAIO Models in Sheetal Nagar

Select your Sony VAIO model for model-specific service details and pricing

Laptop RAM Replacement Service for Other Brands in Sheetal Nagar

We provide Laptop RAM Replacement Service across all major laptop and computer brands

Areas, Roads & Landmarks We Cover in Sheetal Nagar

Free pickup & drop across all these neighbourhoods

Localities & neighbourhoods

  • Sheetal Nagar
  • Mira Road East
  • Golden Nest

Roads & highways

  • Sheetal Nagar Road
  • LT Road
  • Mira Bhayander Road

Landmarks & famous places

  • Sheetal Nagar Colony
  • Mira Road Station
  • D-Mart Mira Road

Sony VAIO Laptop RAM Replacement Service — All Locations

Explore more services

More Repair & Tech Services Near Sheetal Nagar

Same technicians · Free pickup · 90-day warranty across all services.

Free Pickup · ₹350 Inspection, Credited · 90-Day Warranty · 4.9 ★

Book Sony VAIO
Laptop RAM Replacement Service Today

Free doorstep pickup · Expert Laptop RAM Replacement Service · 90-day warranty

Serving Sheetal Nagar and all of Mumbai MMR · Open 9 AM – 9 PM daily

Comparison

Xigox vs Other Sony VAIO Laptop RAM Replacement Service Shops in Sheetal Nagar

What you get with Xigox in Sheetal Nagar, side by side.

FeatureXigoxOther shops
Experienced Technicians Trained & VerifiedVaries; ask who will work on the device
Genuine / OEM Parts OEM-Quality PartsVaries; ask which part will be fitted
90-Day Warranty Written CertificateVaries; ask for the warranty in writing
Diagnosis / Inspection ₹350, credited to the repairVaries; ask what the diagnosis costs
Same-Day Turnaround Sheetal Nagar — Most RepairsVaries; ask for a time in writing
Free Doorstep Pickup Sheetal Nagar — FreeVaries; ask whether pickup is free
Transparent Pricing Written Quote FirstVaries; ask for a written quote first
Live WhatsApp Updates Real-time Repair StatusVaries; ask how you will get updates

Xigox charges ₹350 for inspection — credited to your repair cost if you go ahead.

How it's done

How We Perform Laptop RAM Replacement Service

What our technicians do, what it requires, and how to tell you need it.

1 How It's Performed

When a component genuinely needs swapping rather than repairing, we run a memory diagnostic pass (testing each stick individually when more than one is installed) to confirm whether the fault is a bad module, a loose seating, or a slot-level issue, then fit correctly-specced modules and re-run the test to confirm stability.

Typical time: 15–30 minutes

2 What This Requires

  • Confirmation of how many RAM slots your model has and whether they're user-accessible or soldered — some ultrabooks have some or all memory soldered to the board, which changes what an "upgrade" actually involves.

3 When You Need This

  • Frequent blue screens or random restarts, especially under multitasking or heavier workloads.
  • The system reports less RAM installed than you know is fitted (a sign of a dead or unseated module).
  • Performance feels sluggish specifically when many apps/tabs are open at once, improving when you close them — a classic insufficient-RAM symptom.

Sony VAIO Laptop RAM Replacement Service in Sheetal Nagar — Professional, Reliable, and Affordable

Why waste time on aggregators? Get direct service without middleman markup with Xigox. Every day, people in Sheetal Nagar need trustworthy Sony VAIO Laptop RAM Replacement Service — and Xigox delivers. Having completed thousands of repairs across Mumbai, our technicians combine speed with precision for Sony VAIO Laptop RAM Replacement Service. From startups to family homes in Sheetal Nagar, we've earned the trust that 4.9★ ratings validate.

How the Sony VAIO Laptop RAM Replacement Service Process Step by Step

Getting your Sony VAIO fixed in Sheetal Nagar is designed to be hassle-free. First, message us at +91 74997 61196 sharing your issue. Then, our free pickup technician arrives at your Sheetal Nagar address within the same day. Our engineers then perform a detailed diagnostic (₹350, refunded if you proceed). After your approval, this issue is completed with OEM-grade parts — and your Sony VAIO is delivered back to you. Total turnaround: 24-48 hours.

Rigorous Testing after Sony VAIO Laptop RAM Replacement Service

Fixing the immediate problem is only half the job at Xigox. Prior to delivery in Sheetal Nagar, it must pass a rigorous full-system quality check. Our team ensures that the repair was successful, checking port functionality. This level of testing is the reason for our 4.9★ rating across Sheetal Nagar.

Cost-Effective Sony VAIO Laptop RAM Replacement Service in Sheetal Nagar

Premium issue doesn't have to be expensive in Sheetal Nagar. By optimizing our repair processes, we offer savings of up to half the cost compared to official repair outlets. You get the same OEM components for your Sony VAIO, without the massive markup. Request a price estimate for this issue in Sheetal Nagar today.

Student-Friendly Sony VAIO Laptop RAM Replacement Service for Students

Are you an educator in Sheetal Nagar? We understand a functioning Sony VAIO is essential for assignments. Every booking gets a written quote for the repair before any work starts, and we suggest the most economical fix that will last, such as a part repair instead of a full replacement. Tell us about your deadline when you book and we schedule the pickup accordingly. Don't let tech issues hurt your grades — book now for affordable repair.

Authentic Components for Sony VAIO Laptop RAM Replacement Service

Quality matters for this issue. Because of this, our team strictly use genuine parts for your Sony VAIO. Instead of unbranded components, we use trusted supply chains. This is how we help your issue stay durable, supported by our standard 90-day warranty.

No-Obligation Testing in Sheetal Nagar

Uncertain about the issue with your Sony VAIO? Prior to starting any repair, Xigox performs a thorough diagnostic check. The ₹350 inspection fee, it is 100% refunded if you proceed with the repair. Our technicians in Sheetal Nagar will show you the broken part in plain English so you can make an informed decision.

Same-Day Rush Sony VAIO Laptop RAM Replacement Service Available

Can't wait 48 hours? We provide emergency this issue in Sheetal Nagar for time-sensitive situations. Whether you have a presentation tomorrow and your Sony VAIO just stopped working, our priority service puts your Sony VAIO at the front of the queue, so most repairs can be finished the same business day. Priority repairs are available 7 days a week in Sheetal Nagar. Simply mention 'URGENT' when booking and we'll prioritise your issue immediately.

Green Sony VAIO Laptop RAM Replacement Service Practices in Sheetal Nagar

We are committed to sustainability in Sheetal Nagar. Rather than discarding your broken Sony VAIO, our repair restores it to full working order. We safely dispose of broken components instead of dumping them. When you opt for our service team, you are actively contributing to reduce electronic waste.

Repairs for Sheetal Nagar

We repair devices for homes, offices and colleges across Sheetal Nagar book us with free pickup and drop. You get a written quote before any work, OEM-grade parts and a 90-day warranty, for a single Sony VAIO or a whole office. When you choose Xigox for this issue in Sheetal Nagar, you get the same service and warranty as every other customer.

Multi-Brand Expertise in Sheetal Nagar

Your Sony VAIO model never limits what we can fix. Xigox engineers are trained across all major brands: HP, Dell, Lenovo, Asus, Acer, MSI, Toshiba, Samsung and Apple MacBook. Different manufacturers have unique design choices we account for in every repair. This depth of brand knowledge reduces repair time and lowers the chance of secondary damage.

Stop letting your broken Sony VAIO disrupt your workflow in Sheetal Nagar. Contact Xigox right now to schedule your Sony VAIO Laptop RAM Replacement Service. With our 90-day warranty and transparent pricing, your Sony VAIO is in safe hands. Schedule your free pickup in Sheetal Nagar via WhatsApp.

Service area

Sony VAIO Laptop RAM Replacement Service in Sheetal Nagar — Service Area & Coverage

Xigox provides sony vaio laptop ram replacement service across Sheetal Nagar (PIN 401107), in the Thane district of Mira Road. Our doorstep pickup and on-site service cover the entire Sheetal Nagar area and the neighbourhoods around it.

Localities we cover in Sheetal Nagar: Mira Road East, Golden Nest. Wherever you are in Sheetal Nagar, we can collect your device from your door and bring it back after the repair.

Our technicians regularly serve homes, societies and offices around Sheetal Nagar Colony, Mira Road Station and D-Mart Mira Road, and along Sheetal Nagar Road, LT Road and Mira Bhayander Road. If you're near any of these landmarks, same-day pickup for sony vaio laptop ram replacement service is almost always available.

Sony VAIO Laptop RAM Replacement Service near Sheetal Nagar

We also serve these nearby areas — tap your locality for local sony vaio laptop ram replacement service:

Sony VAIO Laptop RAM Replacement Service price in Sheetal Nagar — know it before you book

  1. 1Pick your device & issue
  2. 2See the real price range
  3. 3Free doorstep pickup in Sheetal Nagar

4.9 from 9,605 customer reviews across all repairs · upfront pricing · 90-day warranty

Before you book: have your device model and a quick description of the issue ready — it speeds up your quote.

Not sure what's wrong?

Find Your Fix by Symptom

Tell us what your device is doing — we'll point you to the right repair, with real pricing and next steps.

See all repair problems we fix

Nearest branch: Mira Road East

~1.2 km from Sheetal Nagar. With free doorstep pickup you don't need to travel — this is our nearest branch.

Book a repair

Sony VAIO Laptop RAM Replacement Service — Book Now

Free pickup · Genuine parts · 90-day warranty

Booking received

We'll call you within 1 hour to confirm your appointment and arrange doorstep pickup.

Inspection fee: ₹350

  • Credited to your total repair cost if you go ahead.
  • Still applies if the device can't be repaired or you decline the repair.

+91

Device type *

Inspection fee: ₹350

  • If you go ahead with the repair, the ₹350 is credited to your total repair cost.
  • If the device can't be repaired or you decide not to continue, the ₹350 inspection fee still applies.

Your details are used only to arrange this repair. By submitting, you agree to our Privacy Policy.

Call WhatsApp