eRef App
52
Quality Score
Solid
eRef App
Low confidence
✍️ bumetric analysis
“
eRef App is an iOS app from Georg Thieme Verlag KG in the Education category, currently rated 4.6★ across 11 ratings. Initial signal reads as no scraped reviews yet: judgment based on metadata only.
Quality Score is 52: Solid (established niche player). For a Education 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
$5.0K
per month
→
12-mo forecast
$5.2K – $10.8K
per month
→
24-mo forecast
$6.4K – $19.2K
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
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
🤖Also on Android
$483/mo · 868 ratings · 4.0★
View →
ONE-TIME · BUILD
💰 Estimated build cost
$60K
↳ What it cost to build · not monthly revenue
Likely range $45K – $80K
$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 |
| ⚙ Education complexity ×1.20 | +$10K |
Total estimate
$60K
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
Direction
Headwinds: rating drift may slow acquisition
6 months
$4.7K – $7.9K
12 months
$5.2K – $10.8K
24 months
$6.4K – $19.2K
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 · 48/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
5.9
Product Quality
3.7
Revenue Strength
3.7
Monetization Maturity
1.0
Defensibility
7.5
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.64★ across 11 reviews — weak — significant quality concerns.
- 📍 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 = $90K-$160K.
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 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (4.6★)METRIC | +$2,200 | |
| Mature app (10y old)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Pre-traction phase (11 ratings)METRIC | −$300 |
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 · v2.37.1
*** Bugfixes ***
Minor bugfixes
Minor bugfixes
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- eRef App
- Developer
- Georg Thieme Verlag KG
- Bundle ID
- de.thieme.eRef
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- 17+
- Languages
- EN, DE
Company
- Website
- Not found
- Tagline
- Notiz anlegen
- Description
- Die medizinische Wissensplattform für evidenzbasierte Medizin: eRef unterstützt Sie mit klinischen Leitlinien & Tools zur Entscheidungsfindung.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $144/mo
- Top-grossing rank
- Outside top 100 in US Education
- 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 growth11 ratings+38% lifetimeShow 3-year history estimate ▾
Tracked (2 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
eRef app - the offline app for the Thieme Knowledge Portal for Physicians
With the eRef app you can now use the eRef Knowledge Portal for Physicians offline while on the go.
The app can be used free of charge by anyone who
- Has an active eRef trial account
- Has a personal eRef license
- Has access to an institutional eRef license
- Is a subscriber to a Thieme journal
- Has an access code for a Thieme book
Overview of functions:
- Load your e-books and e-journals on your smartphone so that you can read them anywhere and anytime.… View full description on the official store →
With the eRef app you can now use the eRef Knowledge Portal for Physicians offline while on the go.
The app can be used free of charge by anyone who
- Has an active eRef trial account
- Has a personal eRef license
- Has access to an institutional eRef license
- Is a subscriber to a Thieme journal
- Has an access code for a Thieme book
Overview of functions:
- Load your e-books and e-journals on your smartphone so that you can read them anywhere and anytime.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 8 MB🔞 17+📱 iOS 15.0+🔖 v2.37.1🔄 updated 0d ago🌐 EN, DE📂 Education💰 Paid
📅
What Worked™ · Development Pipeline
3 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 ↑ 4.20 → 4.64 (improved 0.44★)
2026-05
🔄
Monetization changed: freemium → free
2026-03
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 0★ | 0 | — |
| 🇧🇷 BR | 5★ | 1 | 5★ this version |
| 🇨🇦 CA | 0★ | 0 | — |
| 🇩🇪 DE | 4.23435★ | 4,186 | 4.23435★ this version |
| 🇫🇷 FR | 4.33333★ | 3 | 4.33333★ this version |
| 🇬🇧 GB | 4.5★ | 2 | 4.5★ this version |
| 🇮🇳 IN | 0★ | 0 | — |
| 🇯🇵 JP | 0★ | 0 | — |
| 🇺🇸 US | 4.63636★ | 11 | 4.63636★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
More by Georg Thieme Verlag KG
View all →📦 Portfolio summaryINDIE studio
12apps·$2K/mocombined
✓ Diversified — top app contributes 21%; risk spread across portfolio
About this analysis
Why low confidence: only 11 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
eRef App is a early-stage iOS app in the education space with weak public traction — only 11 ratings, no founder-verified MRR, and not ranked in any monitored grossing chart. The app appears to be monetised, but public signals are too sparse for a precise revenue estimate.
Bottom line: treat all revenue, audience and acquisition-value numbers on this page as directional only — not founder-verified facts.
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does eRef App make per month?▴
Our model estimates eRef App earns roughly $143/mo, but with only 11 ratings the confidence interval is wide. No founder-verified MRR is available for this app, so this is a model output calibrated against comparable apps in the same category. See methodology for the formula.
What apps are like eRef App?▴
Browse the full Education 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 eRef App?▴
eRef App is published by Georg Thieme Verlag KG 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 eRef App's BU Score?▴
eRef App has a BU Score of 52/100 (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.