tellows Caller ID & Blocker
61
Quality Score
Solid
tellows Caller ID & Blocker
Medium confidence
✍️ bumetric analysis
“
tellows Caller ID & Blocker is an iOS app from Netzberater in the Utilities category, currently rated 4.5★ across 1,737 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 61: Solid (established niche player). For a Utilities 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
$8.8K
per month
→
12-mo forecast
$9.1K – $19.0K
per month
→
24-mo forecast
$11.2K – $33.7K
per month
MID 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
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$45K
↳ What it cost to build · not monthly revenue
Likely range $35K – $60K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Slow ROI — current MRR is well below build cost
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 |
| ⚙ Utilities complexity ×0.85 | $-7575 |
Total estimate
$45K
👥 Estimated audience size
345K
Lifetime downloads (US-equivalent)
Monthly active
69K
Daily active
13K
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
| 📲 Utilities engagement | ~200 installs / rating |
| 🔁 Utilities D30 retention | 20% |
| 📍 DAU / MAU stickiness | 0.20 |
DAU / MAU
20% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$8.8K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$8.3K – $13.9K
12 months
$9.1K – $19.0K
24 months
$11.2K – $33.7K
Compound growth at +4.0% MoM (tier baseline for MID). Range widens with horizon — typical noise band ±25% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Below median · 43/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
3.5
Product Quality
8.0
Revenue Strength
3.9
Monetization Maturity
1.0
Defensibility
4.2
Market Position
2.0
Operational Safety
7.0
- 💰 Revenue: Modest — $6K - $13K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.45★ across 1,737 reviews — strong (top 10%).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 1105d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (1105d since update).
🎯 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 = $157K-$280K.
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:
| Paid app ($0.00)METRIC | +$2,800 | |
| Low install base (1,737 ratings)METRIC | +$1,500 | |
| Mature app (8y old)METRIC | +$1,500 | |
| Multilingual (10 languages)METRIC | +$1,500 | |
| Good rating (4.5★)METRIC | +$800 |
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 · v1.7.11
- Optimization of call protection background update
- Push message when harassment proctection is out of date
- Push message when harassment proctection is out of date
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- tellows Caller ID & Blocker
- Developer
- Netzberater
- Bundle ID
- Not found
- App Store URL
- Open in App Store
- Category
- Utilities
- Content rating
- 4+
- Languages
- EN, FR, DE, ID, IT, JA, PT, RU, ES, SV
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
- $287/mo
- Top-grossing rank
- Not found
- 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 growth1,737 ratings+173600% lifetimeShow 3-year history estimate ▾
Tracked (8 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
You are tired of annoying robo- & spamcalls and you want to stop the telephone harassment?
The tellows caller identification and spam protection makes it possible: Detect unknown calls while the phone is ringing, block unwanted phone calls and SMS spam. Also the app offers you to build your personal call blacklist, lookup for unknown phone numbers and rate callers. With tellows, you can finally feel safe again.
FEATURES OF THE APP
• Identification of unknown calls
• Spam lookup, robocalls, ping calls, advertising call,… View full description on the official store →
The tellows caller identification and spam protection makes it possible: Detect unknown calls while the phone is ringing, block unwanted phone calls and SMS spam. Also the app offers you to build your personal call blacklist, lookup for unknown phone numbers and rate callers. With tellows, you can finally feel safe again.
FEATURES OF THE APP
• Identification of unknown calls
• Spam lookup, robocalls, ping calls, advertising call,… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 19 MB🔞 4+📱 iOS 13.0+🔖 v1.7.11🔄 updated 0d ago🌐 EN, FR, DE, ID, IT +5📂 Utilities💰 Paid
📅
What Worked™ · Development Pipeline
8 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
🔄
Monetization changed: paid → free
2026-03
⭐
Rating ↑ 3.00 → 4.45 (improved 1.45★)
2026-03
📈
Crossed 10 ratings — social-proof flywheel kicking in
2025-11
⭐
Rating ↑ 2.60 → 3.00 (improved 0.40★)
2023-04
⭐
Rating ↑ 2.00 → 2.75 (improved 0.75★)
2022-03
⭐
Rating ↓ 2.50 → 2.00 (dropped 0.50★)
2020-10
⭐
Rating ↑ 2.00 → 2.50 (improved 0.50★)
2018-02
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.5★ | 6 | 4.5★ this version |
| 🇧🇷 BR | 4.34109★ | 129 | 4.34109★ this version |
| 🇨🇦 CA | 4.66667★ | 3 | 4.66667★ this version |
| 🇩🇪 DE | 4.45089★ | 1,792 | 4.45089★ this version |
| 🇫🇷 FR | 4.36★ | 125 | 4.36★ this version |
| 🇬🇧 GB | 4.43478★ | 46 | 4.43478★ this version |
| 🇮🇳 IN | 5★ | 1 | 5★ this version |
| 🇯🇵 JP | 3.83333★ | 18 | 3.83333★ this version |
| 🇺🇸 US | 4.51408★ | 142 | 4.51408★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for tellows Caller ID & Blocker: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
Similar apps in Utilities
About this analysis
Why medium confidence: 1,737 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does tellows Caller ID & Blocker make per month?▴
Based on our ML-calibrated revenue forecast, tellows Caller ID & Blocker earns approximately $287/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 tellows Caller ID & Blocker?▴
Browse the full Utilities 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 tellows Caller ID & Blocker?▴
tellows Caller ID & Blocker is published by Netzberater 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 tellows Caller ID & Blocker's BU Score?▴
tellows Caller ID & Blocker has a BU Score of 61/100 (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.