Bookshelf
76
Quality Score
Strong
Bookshelf
High confidence
✍️ bumetric analysis
“
Bookshelf is an iOS app from VitalSource Technologies, Inc. in the Education category, currently rated 4.7★ across 77,688 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 76: Strong (healthy traction). For a Education app, that means healthy traction. 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
ONE-TIME · BUILD
💰 Estimated build cost
$110K
↳ What it cost to build · not monthly revenue
Likely range $80K – $150K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~12 months 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 (185 MB) | +$40K |
| ⚙ Education complexity ×1.20 | +$18K |
Total estimate
$110K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$150K
↳ What it would sell for · not monthly revenue
Marketplace range $125K – $200K · 17× MRR multiple
💸
~1.4× build cost (break-even+)
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 |
| ⭐ ★ rating ≥ 4.4 (solid) | +8% |
| 🏷 Education category multiple | +6% |
Final multiple
17× MRR
👥 Estimated audience size
6.6M
Lifetime downloads (US-equivalent)
Monthly active
1.1M
Daily active
345K
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
| 📲 Education engagement | ~85 installs / rating |
| 🔁 Education D30 retention | 18% |
| 📍 DAU / MAU stickiness | 0.30 |
DAU / MAU
30% sticky
🔬
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)
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 · 51/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
5.0
Product Quality
9.3
Revenue Strength
3.7
Monetization Maturity
1.0
Defensibility
4.5
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.65★ across 77,688 reviews — exceptional (top 1% in category).
- 📍 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. 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 12 of 12 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Mid install base (77,688 ratings)METRIC | +$5,500 | |
| Excellent rating (4.7★)METRIC | +$2,200 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (15y old)METRIC | +$1,500 | |
| Multilingual (32 languages)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| too expensiveREVIEW | −$1,000 | |
| support teamREVIEW | +$900 | |
| Ad-supported / freemiumMETRIC | +$600 |
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 · v11.3.2
* MLA, APA, Harvard, and Vancouver citation formats are available
* Updated Explore UI
* Explore content is integrated into the main search results
* Various bug fixes
* Updated Explore UI
* Explore content is integrated into the main search results
* Various bug fixes
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Bookshelf
- Developer
- VitalSource Technologies, Inc.
- Bundle ID
- com.vitalsource.Bookshelf
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- 4+
- Languages
- AR, BG, CA, CS, DA, NL, EN, FI, FR, DE, EL, HE, HI, HU, IS, GA, IT, JA, KO, NB, PL, PT, RO, RU, ZH, ES, SV, TH, ZH, TR, VI, CY
Company
- Website
- www.vitalsource.com
- Tagline
- Not found
- Description
- Not found
- 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
- $9.4K/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.
✨AI Revenue EstimateCONFIDENCE: LOW
Specific revenue for the 'Bookshelf' iOS app by VitalSource Technologies, Inc. is not publicly available. VitalSource's business model primarily involves partnerships with educational institutions and publishers to deliver digital course materials, often through institutional licenses or 'Inclusive Access' programs, rather than direct in-app purchases or subscriptions for the iOS app itself. Estimates for VitalSource Technologies, Inc.'s overall annual revenue vary significantly across sources, ranging from $15.2 million to $74 million, $269 million, and even between $250 million and $500 million.
Sources mentioned: Growjo, Owler, Bitscale, ECDB, LeadIQ, VitalSource Success
📈Ratings growth77,688 ratings+19% lifetimeShow 3-year history estimate ▾
Tracked (44 weeks) Pre-tracking estimate (35 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
With Bookshelf, you can enjoy a digital-first, comprehensive study experience from the convenience of your iPad or iPhone. Access all of your VitalSource textbooks and study anytime, anywhere.
Bookshelf Features:
• Download books to your iOS device for 100% offline reading.
• Customize highlighters and add notes for a rich study experience.
• Create flashcards with text and images to learn concepts faster.
• Personalize font, font size, and background colors to make reading easier.
• Listen to your books and learn on the go with Read Aloud.… View full description on the official store →
Bookshelf Features:
• Download books to your iOS device for 100% offline reading.
• Customize highlighters and add notes for a rich study experience.
• Create flashcards with text and images to learn concepts faster.
• Personalize font, font size, and background colors to make reading easier.
• Listen to your books and learn on the go with Read Aloud.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 185 MB🔞 4+📱 iOS 17.6+🔖 v11.3.2🔄 updated 0d ago🌐 AR, BG, CA, CS, DA +27📂 Education💰 Paid
📅
What Worked™ · Development Pipeline
12 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: freemium → free
2026-03
⭐
Rating ↑ 2.40 → 4.50 (improved 2.10★)
2026-03
📈
Crossed 1,000 ratings — social-proof flywheel kicking in
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
2022-06
📈
Crossed 100 ratings — social-proof flywheel kicking in
2022-01
📈
Crossed 50 ratings — social-proof flywheel kicking in
2021-09
📈
Crossed 10 ratings — social-proof flywheel kicking in
2021-09
⭐
Rating ↓ 3.17 → 2.86 (dropped 0.31★)
2021-09
⭐
Rating ↑ 3.00 → 3.40 (improved 0.40★)
2021-09
⭐
Rating ↓ 3.67 → 3.00 (dropped 0.67★)
2021-08
⭐
Rating ↑ 1.00 → 3.00 (improved 2.00★)
2021-08
🚀
First tracked snapshot — initial data captured
🧪
Tech & Domain Intel — vitalsource.com
- Mail provider
- Microsoft 365
- Tech stack
- Microsoft 365 · Anthropic · Apple Pay / Sign in with Apple · Meta (Facebook) Ads · Google Workspace · OpenAI · SendGrid
Derived from public RDAP + DNS TXT records (no scraping, no login).
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.42854★ | 4,401 | 4.42854★ this version |
| 🇧🇷 BR | 4.65646★ | 1,895 | 4.65646★ this version |
| 🇨🇦 CA | 4.53307★ | 7,802 | 4.53307★ this version |
| 🇩🇪 DE | 4.1555★ | 971 | 4.1555★ this version |
| 🇫🇷 FR | 4.43991★ | 441 | 4.43991★ this version |
| 🇬🇧 GB | 4.51321★ | 2,574 | 4.51321★ this version |
| 🇮🇳 IN | 4.64614★ | 1,170 | 4.64614★ this version |
| 🇯🇵 JP | 4.22717★ | 854 | 4.22717★ this version |
| 🇺🇸 US | 4.65404★ | 77,864 | 4.65404★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for Bookshelf: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why high confidence: 77,688 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does Bookshelf make per month?▴
Based on our ML-calibrated revenue forecast, Bookshelf earns approximately $9.4K/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 Bookshelf?▴
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 Bookshelf?▴
Bookshelf is published by VitalSource Technologies, Inc. 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 Bookshelf's BU Score?▴
Bookshelf has a BU Score of 76/100 (Strong). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.