Skip to main content
HP · ProDesk 400 G9 · Chinchani

HP ProDesk 400 G9
Computer Sound Card Repair
in Chinchani

Expert repair for your HP ProDesk 400 G9 in Chinchani. Free doorstep pickup, OEM-quality parts & 90-day warranty.

✓ Free Doorstep Pickup ✓ Same-Day Repair ✓ 90-Day Warranty ✓ ISO 9001 Certified

Open every day, 9 AM – 9 PM

Technician brushing dust off an opened laptop motherboard with a cleaning brush Technician testing a laptop mainboard with a multimeter beside a Xigox-branded monitor
Xigox technicians at the repair bench
Tejas Chudasama, Xigox Founder Janak Chudasama, Xigox CTO

Run by Tejas & Janak Chudasama since 2011

Xigox is a family-run, ISO 9001:2015-certified repair business, not a marketplace listing or a franchise. Every repair is backed by a written 90-day warranty and billed against GSTIN 27AJXPC8441R1Z7. Read our story

Repair Pricing

HP ProDesk 400 G9 Computer Sound Card Repair — Price List

Transparent pricing · ₹350 inspection (refunded if you proceed with repair) · No hidden charges · Pay only after approval

Issue / ComponentRepair PriceWarranty
Diagnosis & Basic Repair ₹499 - ₹999 90 Days
Standard Component Repair ₹999 - ₹2,499 90 Days
Advanced Chip-Level Repair ₹3,999 - ₹7,999 90 Days
Major Hardware Repair ₹4,499 - ₹9,999 90 Days

Prices may vary by exact condition. Final quote given after ₹350 inspection (refunded if you proceed with repair).

Get Exact Quote

Why Us?

Why Choose Xigox for HP Computer Sound Card Repair in Chinchani?

With 1,00,082+ successful repairs and a 4.9-star rating, Xigox is an independent HP repair specialist serving Chinchani. Serving all addresses in the 401503 postal zone.

Transparent Pricing

₹350 inspection fee (refunded if you proceed). Written quote before any HP Computer Sound Card Repair work begins.

No Fix, No Repair Fee

If we cannot resolve your HP Computer Sound Card Repair issue, you pay nothing beyond the inspection fee.

Component-Level Repairs

We repair HP 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 HP hardware regularly. Every repair is tested before return.

Genuine & OEM-Grade Parts

We use genuine HP 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.

Repairs Completed
1,00,082+
Since 2011
Average Rating
4.9 ★
9,727+ 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 Palghar

Who repairs your device

Repaired in-house by Xigox technicians

Your HP ProDesk 400 G9 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.
Our Process

How HP ProDesk 400 G9 Computer Sound Card Repair Works

From booking to delivery — here's exactly what happens at every step

Book Pickup

Call or WhatsApp +91 74997 61196. Tell us your HP ProDesk 400 G9 issue in Chinchani and schedule a free doorstep pickup.

₹350 Inspection (refunded if you proceed with repair)

Our experienced technician inspects your HP ProDesk 400 G9 and provides a transparent written quote for Computer Sound Card Repair.

Expert Repair

Once approved, we perform Computer Sound Card Repair using OEM-quality parts. Most repairs are completed same-day.

Quality Check

Every HP ProDesk 400 G9 passes a multi-point QA test before delivery. Your 90-day warranty starts from this moment.

Free Delivery

We deliver your repaired HP ProDesk 400 G9 back to your Chinchani address. Completely free, same day.

After-Service Care

Post-repair support via WhatsApp. If the issue recurs within 90 days, we fix it at zero cost.

Repair examples

Recently Repaired Desktops & Computers

View All Recent Repairs

Lenovo

ThinkCentre M70t

Fixed
Issue
PC randomly shutting down during heavy workloads. Sometimes fails to POST. Capacitor bulging visible.
Solution
Replaced 3 failed electrolytic capacitors with Japanese-grade caps. Reflowed solder joints around VRM area.

Technician's note

Component-level repair saved customer from motherboard replacement cost.

Thane West 3 Hours
  • Motherboard
  • Lenovo
  • Capacitor

HP

ProDesk 400 G9

Fixed
Issue
Office desktop extremely slow. Boot time over 3 minutes. Applications taking 30+ seconds to launch.
Solution
Upgraded from 1TB HDD to 512GB NVMe SSD. Cloned OS and data. Boot time reduced to 8 seconds.

Technician's note

Original HDD retained as secondary storage. Best ROI upgrade for any desktop.

Bandra East 2 Hours
  • SSD
  • HP
  • Desktop

Dell

OptiPlex 7010

Fixed
Issue
PC dead — no power, no LED indicators. Power supply fan not spinning at all.
Solution
Diagnosed failed 450W PSU. Replaced with compatible unit. All components powered on successfully.

Technician's note

PSU exceeded 5-year lifespan. Recommended surge protector for office fleet.

Andheri West 1 Hour
  • PSU
  • Dell
  • Desktop

Gaming

PC RTX 4080

Fixed
Issue
No display output, fans spinning. No boot sequence.
Solution
Diagnosed motherboard failure. Replaced with compatible board.
Goregaon West 4 Hours
  • Motherboard
  • Gaming
  • Display

HP

ProDesk 400 G7

Fixed
Issue
Desktop not powering on. Power button LED blinking 5 times — indicates motherboard failure per HP diagnostics.
Solution
Found 3 bulging capacitors near CPU VRM section. Replaced all faulty capacitors with same-spec rated components. Tested under load for stabi...

Technician's note

Capacitor failure likely caused by prolonged voltage fluctuation. Recommended UPS installation.

Malad West 3 Hours
  • HP
  • Motherboard
  • Capacitor

Custom

Build (AMD Ryzen 7)

Fixed
Issue
Client wanted to upgrade from GTX 1660 to RTX 4070. Existing 450W PSU insufficient for new GPU.
Solution
Installed Corsair RM750e PSU with proper cable management. Mounted RTX 4070 with support bracket. Updated BIOS and installed latest drivers....

Technician's note

Old PSU only had one 8-pin PCIe connector. New 750W provides clean, stable power for the RTX 4070.

Andheri East 2.5 Hours
  • Gaming PC
  • GPU Upgrade
  • PSU

Comparison

Xigox vs Other HP ProDesk 400 G9 Shops in Chinchani

What you get with Xigox in Chinchani, 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 Chinchani — Most RepairsVaries; ask for a time in writing
Free Doorstep Pickup Chinchani — 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.

Customer reviews

What Customers Say About HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani

4.9/5 · 12 reviews shown

See all 9,727+ reviews

HP OMEN 40L — Boot Issues Fix

“My HP OMEN 40L stopped booting into Windows showing disk errors. Xigox Thane diagnosed a failing SSD, cloned all data to a new drive, and restored full boot functionality. All programs and settings preserved perfectly.”
D Deepa Nene Chinchani · 9 Oct 2025 9

HP Z2 Tower G9 — BSOD Fix

“My HP Z2 Tower G9 showed constant blue screen of death errors. Xigox Nalasopara ran extensive diagnostics and found a bad RAM module. Replaced it and updated all drivers. Rock-solid stability since the repair. Efficient diagnosis.”
S Subodh Bhave Jogeshwari West · 23 Mar 2025 45

HP ProDesk 400 G9 — Memory Upgrade

“My HP ProDesk 400 G9 struggled with just eight gigs of RAM. Xigox Juhu installed thirty-two gigs in dual-channel with XMP enabled. Run Photoshop, Chrome, and Slack simultaneously now without any slowdown. Huge improvement.”
A Archana Nipunge Govandi · 31 May 2026 33

HP EliteDesk 800 G9 — Power Supply Fix

“My HP EliteDesk 800 G9 shut down during gaming sessions. Xigox Kandivali diagnosed PSU voltage drops under load. Replaced with eighty-plus gold rated unit and routed cables neatly. Zero shutdowns since then. Professional work.”
R Revati Aphale Chinchani · 27 Apr 2025 2

HP ProDesk 400 G9 — Memory Upgrade

“My HP ProDesk 400 G9 struggled with just eight gigs of RAM. Xigox Worli installed thirty-two gigs in dual-channel with XMP enabled. Run Photoshop, Chrome, and Slack simultaneously now without any slowdown. Huge improvement.”
A Archana Nipunge Bandra Kurla Complex · 20 Jul 2025 26

HP ProDesk 400 G9 — OS Installation

“Windows on my HP ProDesk 400 G9 was corrupted beyond repair. Xigox Khar performed a clean installation, migrated all my files, reinstalled essential software, and configured drivers. Boots fast and runs perfectly now.”
S Shreyas Talpade Malad West · 6 Feb 2026 26
Page 1 / 2

← Swipe or tap dots to browse →

Customer stories

Customer Stories

What customers say about their laptop and computer repairs

“Desktop was freezing randomly. Xigox diagnosed a failing HDD, replaced with SSD. Boot time went from 3 minutes to 15 seconds. Outstanding upgrade!”

HP ProDesk 600 G6

S Sudhir Pawar Navi Mumbai
“Graphics card died on our office desktop. Xigox sourced a compatible GPU and installed it same day. CAD software running smoothly again. Great service!”

Dell OptiPlex 7080

K Kavya Shetty Vashi
“RAM upgrade from 8GB to 32GB plus NVMe SSD. Xigox handled everything — cable management, BIOS update, Windows reinstall. PC is blazing fast now!”

Custom Gaming PC

P Pramod Jadhav Kharghar
“iMac screen had a crack — thought it was a write-off. Xigox repaired it for half the Apple Store price. Looks and works perfectly. Saved so much money!”

Apple iMac 2021

S Sunita Rathod Belapur
“PSU blew out with a bang. Xigox replaced the power supply unit within 3 hours. All data intact, no OS reinstall needed. Professional and fast!”

Lenovo ThinkCentre M90n

V Vilas Shinde Nerul
“Blue screen errors every hour. Xigox ran diagnostics — faulty RAM stick. Replaced under warranty, reinstalled Windows 11. No crashes in 2 months!”

Assembled Desktop i7

R Rashmi Deshpande Panvel

FAQ

FAQs — HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani

Everything you need to know before booking your repair

10 questions answered

Most repairs completed within 2-6 hours. Complex issues may take 1-2 days. We provide estimated timelines after diagnostic.
Yes, all repairs come with a 90-day warranty covering parts and workmanship.
Costs depend on the specific issue and device. You get a detailed written quote after the ₹350 inspection, which is credited to the repair.
We accept all major payment methods for HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani: 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 Palghar district for over 15 years.
Yes — out-of-warranty computers are most of what we handle in Chinchani. 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. Free pickup also available in Betegaon, Tarapur Road, Umroli Station and surrounding areas.
You pay nothing beyond the ₹350 inspection. If we cannot resolve the fault, we explain exactly what we found, return your computer 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've been serving Palghar district for over 15 years.
For software faults, setup, upgrades and diagnostics we can work on-site anywhere in Chinchani. Component-level work — board repair, screen bonding, liquid-damage recovery — needs workshop equipment, so we collect the computer, repair it, and return it. Both options are free of travel charges. Our service covers the full 401503 postal area in Chinchani.
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 computer rather than a general helpline. We've been serving Palghar district for over 15 years.
Back up documents, photos and anything stored only on that computer before any repair — with us or anyone else. Most HP ProDesk 400 G9 Computer Sound Card Repair work does not touch your data, but board-level faults and storage failures can be unpredictable. Tell us in advance if the drive holds irreplaceable data and we will treat recovery as the first priority. Our service covers the full 401503 postal area in Chinchani.
Our rule of thumb: if the repair costs more than roughly half of a comparable replacement and the computer is more than five years old, replacement is usually the better call. We tell you which side of that line you are on during the inspection in Chinchani, even when the answer means we do not get the job. We've been serving Palghar district for over 15 years.

Still have questions?

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

HP ProDesk 400 G9 Repair in Chinchani — Xigox

Xigox is Chinchani's leading independent specialist for HP ProDesk 400 G9 repair. Our engineers are not generalists — they undergo dedicated training on HP hardware, firmware and diagnostics. Since 2011, we have completed over 1,00,000+ repairs across all HP product lines, earning a 4.9-star average customer rating.

We stock genuine HP parts and OEM-compatible components for every common HP ProDesk 400 G9 fault — from screen replacements and battery swaps to logic board repairs and data recovery. Before any work begins, you receive a written cost estimate. Our ₹350 inspection fee is refunded if you proceed with the repair.

We actively serve the entire 401503 postal area within Palghar district, ensuring same-day response for every repair request. ₹350 inspection fee (refunded if you proceed with repair). Located near Vangaon, our service coverage extends across Chinchani and all surrounding localities. In addition to Chinchani, we also provide doorstep repairs and free pickup for lab work for customers in Betegaon, Tarapur Road, Umroli Station and other nearby areas.

Doorstep part replacement (battery, keyboard, screen, SSD, RAM) is available across Chinchani. For chip-level and motherboard repairs, we provide free pickup and drop — confirming within 15 minutes of your booking. Most common faults are resolved same-day. For complex repairs, we provide a realistic timeline and keep you updated throughout.

We back HP work with a 90-day parts-and-labour warranty in writing, not just a verbal promise. If your HP ProDesk 400 G9 does come back with the same fault, we cover it. You keep a direct WhatsApp line to the team that did the work.

Service Hours

Monday – Sunday · 9 AM – 9 PM

Open on all public holidays

Service Area

Chinchani & 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

Computer Sound Card Repair for Other HP Models

We repair all HP models in Chinchani

Computer Sound Card Repair for Other Brands in Chinchani

We repair all major brands — same service, same quality, same warranty

Areas, Roads & Landmarks We Cover in Chinchani

Free pickup & drop across all these neighbourhoods

Localities & neighbourhoods

  • Chinchani
  • Vangaon
  • Dahanu

Roads & highways

  • Chinchani Road
  • NH-48 (Mumbai-Ahmedabad Highway)
  • Vangaon Station Road

Landmarks & famous places

  • Chinchani Beach
  • Chinchani Post Office
  • Vangaon Station (nearby)

Not sure which repair you need? See all HP ProDesk 400 G9 repairs in Chinchani

Computer Sound Card Repair Across Mumbai — All Locations

Explore more services

More Repair & Tech Services Near Chinchani

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

ISO 9001:2015 Certified · 1,00,082+ Repairs · 4.9 ★ Rating

Ready to Fix Your
HP ProDesk 400 G9 Today?

₹350 inspection fee (refunded if you proceed with repair) · Same-day Computer Sound Card Repair · 90-day warranty

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

How it's done

How We Perform Computer Sound Card Repair

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

1 How It's Performed

When this needs a genuine repair rather than a reset, we isolate whether the fault is the speaker hardware itself or the audio driver/software path by testing output through headphones and an external speaker first, then open the chassis to inspect or replace the speaker unit and its connector if the hardware is confirmed faulty.

Typical time: 20–40 minutes

2 What This Requires

  • A test through headphones/external speakers first, to separate a hardware fault from a driver or Bluetooth-output misconfiguration.
  • A speaker unit matched to your model's exact mounting bracket and connector.

3 When You Need This

  • Audio is distorted, crackling, or rattles specifically at higher volumes.
  • One speaker is noticeably quieter than the other, or silent altogether.
  • No sound at all, even though headphones and external speakers both work correctly.

The model

About the HP ProDesk 400 G9

Best for: small/medium business desktop deployment

The HP ProDesk 400 G9 is HP's mid-tier business desktop line — sitting below EliteDesk, offering business features at a more accessible price for small/medium businesses.

Key features

  • Business features (manageability, basic security) without the full EliteDesk price premium.
  • Standard tower and small-form-factor configurations available.
  • Positioned for SMB budgets.

HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani — Professional, Reliable, and Affordable

Tired of middlemen? Work with the actual repair team — Xigox. HP ProDesk 400 G9 Computer Sound Card Repair for desktops in Chinchani need a different approach than laptop repair — a POST card, PSU tester, and RAM slot isolation. Xigox technicians use a methodical component-isolation sequence: starting from the most common fault point outward. This prevents unnecessary parts purchases — you don't replace a ₹8,000 GPU if the PSU is the real fault.

Authentic Components for HP ProDesk 400 G9 Computer Sound Card Repair

Longevity matters for this issue. Because of this, our team strictly use OEM-grade parts for your HP. Instead of grey-market components, we use trusted supply chains. This guarantees your issue will last, supported by our standard 90-day warranty.

Same-Day Rush HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani

Is your deadline today? Xigox offers rush the repair in Chinchani for urgent situations. From an important client meeting and your HP just crashed, our emergency service ensures completion within the same business day. Emergency the repair can be arranged including weekends in Chinchani. Just say 'priority' when calling and our team will fast-track your repair immediately.

Guaranteed Protection for HP ProDesk 400 G9 Computer Sound Card Repair

All this issue performed by Xigox in Chinchani comes with a written 90-day warranty covering parts and labour. Simply put, if the same issue recurs within 90 days, we redo it completely free. Xigox issues a printed warranty receipt every single time, so you know exactly what is covered.

Premium Protection HP ProDesk 400 G9 Computer Sound Card Repair Options

Many Chinchani customers wonder whether their laptop insurance covers the repair. We help with insurance claims and can generate the detailed GST invoice required for claim submission — broken down by component and labour. When manufacturer warranty has expired, our repair is almost always often far cheaper compared to the brand's authorised centre.

Xigox Service Promise for HP ProDesk 400 G9 Computer Sound Card Repair

Your issue doesn't end when the HP is returned. The Xigox after-service team remains reachable 7 days a week, 9 AM–9 PM via WhatsApp or phone. Should any concern arise within 90 days of your issue, simply contact us and a technician is dispatched at no cost. This commitment is why residents in Chinchani return to Xigox.

Rigorous Testing after HP ProDesk 400 G9 Computer Sound Card Repair

Fixing the immediate problem is only half the job at Xigox. Before your HP is returned in Chinchani, it must pass a strict multi-point quality check. Our team ensures that the repair was 100% successful, checking port functionality. This level of testing is the reason for our 4.9★ rating across Chinchani.

Component-Level HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani

Swapping the whole board costs 3–5x more than fixing the fault on it. Xigox's on-site micro-soldering lab means engineers identify the specific chip and repair at the component level — saving customers thousands of rupees. Customers in Chinchani come to Xigox specifically for this.

Expert Technicians for HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani

Not everyone in Chinchani can handle complex the repair. Xigox's engineers work on HP hardware every day specifically for HP hardware. Whether it's a minor fix or advanced component-level motherboard repair, we fix it properly right here for Chinchani clients.

Free Logistics across Chinchani

Traveling across town in Chinchani takes hours. That's why Xigox has built a straightforward pickup and delivery network for this issue. Just drop your pin, and our technician will pick up the HP from your home or office. After the issue is completed, it is delivered back fully tested and sealed. Save your time without leaving your desk.

The Best Choice for HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani

There are many repair shops in Chinchani, however, Xigox stands out for the repair. We believe in 100% upfront pricing. Each repair begins with a thorough diagnostic inspection for ₹350, which is fully refunded if you proceed. No surprise fees — only expert repair in Chinchani.

Countless returning customers across Mumbai, Thane and Palghar confirm our expertise. We're the trusted choice for HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani. Every repair comes with a written warranty, genuine parts, and full honesty. Request your quote — WhatsApp us today.

Service area

HP ProDesk 400 G9 Computer Sound Card Repair in Chinchani — Service Area & Coverage

Xigox provides hp prodesk 400 g9 computer sound card repair across Chinchani (PIN 401503), in the Palghar district of Chinchani. Our doorstep pickup and on-site service cover the entire Chinchani area and the neighbourhoods around it.

Localities we cover in Chinchani: Vangaon, Dahanu. Wherever you are in Chinchani, we can collect your device from your door and bring it back after the repair.

Our technicians regularly serve homes, societies and offices around Chinchani Beach, Chinchani Post Office and Vangaon Station (nearby), and along Chinchani Road, NH-48 (Mumbai-Ahmedabad Highway) and Vangaon Station Road. If you're near any of these landmarks, same-day pickup for hp prodesk 400 g9 computer sound card repair is almost always available.

HP ProDesk 400 G9 Computer Sound Card Repair near Chinchani

We also serve these nearby areas — tap your locality for local hp prodesk 400 g9 computer sound card repair:

HP ProDesk 400 G9 Computer Sound Card Repair price in Chinchani — know it before you book

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

4.9 from 52 customer reviews for this service · 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.

Our head office: Virar West

~44.5 km from Chinchani. With free doorstep pickup you don't need to travel — this is where the repair is done.

Book a repair

HP ProDesk 400 G9 Computer Sound Card Repair — 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