SkyPhone - Voice & Video Calls
57
Quality Score
Solid
SkyPhone - Voice & Video Calls
Medium confidence
✍️ bumetric analysis
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SkyPhone - Voice & Video Calls is an iOS app from QuadSystem Co., Ltd. in the Social Networking category, currently rated 4.0★ across 257 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 57: Solid (established niche player). For a Social Networking app, that means established niche player. The full BU Investment Matrix below scores 8 dimensions including monetisation, growth, and operational risk.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
💰 Monthly revenue · now vs forecast
● Right now
$500
per month
→
12-mo forecast
$437 – $1575
per month
→
24-mo forecast
$405 – $3644
per month
INDIE tier
💡 Grow this revenue
Free AI audit of this app’s store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
Typical impact: +2-5× organic installs
📊 Performance Tracking LIVE
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
🤖Also on Android
$932/mo · 7K ratings · 3.6★
View →
ONE-TIME · BUILD
💰 Estimated build cost
$150K
↳ What it cost to build · not monthly revenue
Likely range $110K – $200K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~1.4y at current MRR
Synthetic estimate. Inputs: category complexity, file size, screen count, monetization layer, platform reach, age × team-size proxy. Calibrated against 2024-2026 indie-agency rate surveys. Full math + source list on /methodology.
Where the money goes
| 🧱 MVP baseline (design + 1-store ship) | +$28K |
| 📱 5 unique screens × $4.5K | +$22K |
| 📦 Asset bundle (146 MB) | +$38K |
| ⚙ Social Networking complexity ×1.70 | +$62K |
Total estimate
$150K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$125K
↳ What it would sell for · not monthly revenue
Marketplace range $100K – $175K · 14× MRR multiple
💸
~0.8× build cost (under-water)
Synthetic estimate. Multiple band derived from ad-supported + age, rating quality, category demand, and user-base maturity. Calibrated against 2024-2026 indie-app-marketplace closed-deal medians. Full math + comparable deal list on /methodology.
How the multiple was built
| 📺 Ad-supported base | 15× MRR |
| 🏷 Social Networking category multiple | +5% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
14× MRR
👥 Estimated audience size
23K
Lifetime downloads (US-equivalent)
Monthly active
5.7K
Daily active
3.1K
Synthetic estimate from ratings × category benchmarks. Calibrated against 2024-2026 mobile-attribution retention + DAU/MAU reports. Numbers are US-storefront-equivalent — true global audience can be 5-10× larger for international apps. Full math + source list on /methodology.
How we sized it
| 📲 Social Networking engagement | ~90 installs / rating |
| 🔁 Social Networking D30 retention | 25% |
| 📍 DAU / MAU stickiness | 0.55 |
DAU / MAU
54% sticky
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$500/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
6 months
$426 – $993
12 months
$437 – $1.6K
24 months
$405 – $3.6K
Compound growth at +6.0% MoM (tier baseline for INDIE). Range widens with horizon — typical noise band ±40% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Early-stage solo · 44/100INDIE TIERexpected for tierGrowth Velocity
5.0
Founder Strength
5.0
Product Quality
5.7
Revenue Strength
2.7
Monetization Maturity
1.0
Defensibility
6.0
Market Position
0.0
Operational Safety
10.0
- 💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.04★ across 257 reviews — below category median.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 For competitors: Mixed picture. Worth competing if you have a clear UX or pricing edge — otherwise crowded segment.
💵 For acquirers: Estimated asking range 18-32× monthly = $9K-$16K. Portfolio play ($9K/mo combined) commands premium.
Composite of 8 dimensions computed deterministically from public signals — no LLM, every score traces back to a measurable input. Default weights shown; "compete" / "acquire" / "invest" lenses re-weight without re-fetching.
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| excellent appREVIEW | +$1,500 | |
| Mature app (12y old)METRIC | +$1,500 | |
| Good rating (4.0★)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Early-stage install base (257 ratings)METRIC | +$400 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🆕 What's New · v1.11.0
- Released a group messaging feature for Circle members.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- SkyPhone - Voice & Video Calls
- Developer
- QuadSystem Co., Ltd.
- Bundle ID
- jp.co.quadsystem.VoIP01Distribution
- App Store URL
- Open in App Store
- Category
- Social Networking
- Content rating
- 17+
- Languages
- EN, JA
Company
- Website
- Not found
- Tagline
- Today
- Description
- Find apps and games for iPhone, iPad, Mac, and more on the App Store.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Available
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $8.7K/mo
- Top-grossing rank
- Outside top 100 in US Social Networking
- All-time revenue
- Not found
- Pricing
- Not found
Founder
Founder data not yet collected for this app.
Funding
Funding data not yet collected for this app.
Press & Links
Press & Links data not yet collected for this app.
Contacts & Socials
Contacts & Socials data not yet collected for this app.
📈Ratings growth257 ratings+25600% lifetimeShow 3-year history estimate ▾
Tracked (21 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
📝 About this app
SkyPhone - Voice & Video Calls
Over 11 Million Downloads!
SkyPhone is a simple and free calling app.
Just listen and you'll soon notice the high quality sound.
You can start using the app without having to register your personal information.
Enter your profile and share your SkyPhone number with friends and family.
SkyPhone users can enjoy the clear, high-quality voice calls on SkyPhone for FREE.
Simple UI !
The Allow Contacts Only feature blocks calls from unregistered contacts.
You can connect only to those who you want to.… View full description on the official store →
Over 11 Million Downloads!
SkyPhone is a simple and free calling app.
Just listen and you'll soon notice the high quality sound.
You can start using the app without having to register your personal information.
Enter your profile and share your SkyPhone number with friends and family.
SkyPhone users can enjoy the clear, high-quality voice calls on SkyPhone for FREE.
Simple UI !
The Allow Contacts Only feature blocks calls from unregistered contacts.
You can connect only to those who you want to.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 146 MB🔞 17+📱 iOS 15.0+🔖 v1.11.0🔄 updated 0d ago🌐 EN, JA📂 Social Networking💰 Paid
📅
What Worked™ · Development Pipeline
10 EVENTS TRACKEDDetected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →
2026-05
⭐
Rating ↓ 4.50 → 4.04 (dropped 0.46★)
2026-05
🔄
Monetization changed: freemium → free
2026-03
⭐
Rating ↑ 3.47 → 4.50 (improved 1.03★)
2026-03
📈
Crossed 50 ratings — social-proof flywheel kicking in
2024-01
📈
Crossed 10 ratings — social-proof flywheel kicking in
2021-06
⭐
Rating ↓ 3.50 → 3.14 (dropped 0.36★)
2020-05
⭐
Rating ↑ 3.33 → 3.75 (improved 0.42★)
2018-10
⭐
Rating ↓ 4.50 → 3.33 (dropped 1.17★)
2018-07
⭐
Rating ↓ 5.00 → 4.50 (dropped 0.50★)
2017-05
🚀
First tracked snapshot — initial data captured
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for SkyPhone - Voice & Video Calls: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by QuadSystem Co., Ltd.
View all →📦 Portfolio summaryINDIE studio
2apps·$9K/mocombined
⚠ Concentrated — top app contributes 90% of combined revenue (single-app dependency)
Similar apps in Social Networking
About this analysis
Why medium confidence: 257 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does SkyPhone - Voice & Video Calls make per month?▴
Based on our ML-calibrated revenue forecast, SkyPhone - Voice & Video Calls earns approximately $8.7K/mo. This is a US-storefront-equivalent estimate; global revenue can be several times larger for internationally-distributed apps. See the methodology page for the full formula and confidence bands.
What apps are like SkyPhone - Voice & Video Calls?▴
Browse the full Social Networking category catalog to find similar apps with revenue, build cost, audience and tech stack data. Each /p/{slug} page also shows a Compare side-by-side widget with three peer apps from the same niche.
Who makes SkyPhone - Voice & Video Calls?▴
SkyPhone - Voice & Video Calls is published by QuadSystem Co., Ltd. on the Apple App Store. See the full publisher portfolio (other apps by the same developer) via the More by developer block on the product page above.
What is SkyPhone - Voice & Video Calls's BU Score?▴
SkyPhone - Voice & Video Calls has a BU Score of 57/100 (Solid). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.