SideBooks
55
Quality Score
Solid
SideBooks
Low confidence
✍️ bumetric analysis
“
SideBooks is an iOS app from Tatsumi-system Co., Ltd. in the Food & Drink category, currently rated 5.0★ across 1 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 55: Solid (established niche player). For a Food & Drink 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
ONE-TIME · BUILD
💰 Estimated build cost
$55K
↳ What it cost to build · not monthly revenue
Likely range $40K – $75K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~6 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 |
| ⚙ Food & Drink complexity ×1.10 | +$5K |
Total estimate
$55K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$150K
↳ What it would sell for · not monthly revenue
Marketplace range $125K – $200K · 16× MRR multiple
💸
~2.7× return on build cost
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 ≥ 4.7 (premium) | +15% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
16× MRR
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$500/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
Direction
Headwinds: rating drift may slow acquisition
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 · 43/100INDIE TIERexpected for tierGrowth Velocity
5.0
Founder Strength
5.0
Product Quality
4.0
Revenue Strength
2.7
Monetization Maturity
1.0
Defensibility
4.5
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 5.0★ across 1 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 = $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 10 of 10 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (5.0★)METRIC | +$2,200 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (15y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Localized (5 languages)METRIC | +$600 | |
| Pre-traction phase (1 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 · v2.89.2
*Readjusted the behavior of swiping left to right to go back to the previous screen while browsing files in iOS 26 environments.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- SideBooks
- Developer
- Tatsumi-system Co., Ltd.
- Bundle ID
- Not found
- App Store URL
- Open in App Store
- Category
- Food & Drink
- Content rating
- 4+
- Languages
- EN, JA, KO, ZH, ZH
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
- $9.8K/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 ratings+-99% lifetimeShow 3-year history estimate ▾
Tracked (60 weeks) Pre-tracking estimate (36 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
SideBooks is a high performance, high speed PDF viewer that allows you to enjoy reading with the feel of actual paper.
=Features=
Curl animation that simulates the actual turning of paper pages has been added to the standard page slide function.
Supports viewing from 3 directions, documents that open left to right, right to left and vertically. It provides the optimal environment for viewing any book.
All zoom rates have been optimized providing high speed, dynamic screen display.
An infinite hierarchy of folders can be created, moved, deleted, renamed, etc.… View full description on the official store →
=Features=
Curl animation that simulates the actual turning of paper pages has been added to the standard page slide function.
Supports viewing from 3 directions, documents that open left to right, right to left and vertically. It provides the optimal environment for viewing any book.
All zoom rates have been optimized providing high speed, dynamic screen display.
An infinite hierarchy of folders can be created, moved, deleted, renamed, etc.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 32 MB🔞 4+📱 iOS 9.0+🔖 v2.89.2🔄 updated 0d ago🌐 EN, JA, KO, ZH, ZH📂 Food & Drink💰 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 →
2026-03
⭐
Rating ↓ 5.00 → 3.70 (dropped 1.30★)
2026-03
📈
Crossed 10 ratings — social-proof flywheel kicking in
2026-03
⭐
Rating ↑ 3.69 → 5.00 (improved 1.31★)
2013-11
📈
Crossed 100 ratings — social-proof flywheel kicking in
2012-11
📈
Crossed 50 ratings — social-proof flywheel kicking in
2011-09
📈
Crossed 10 ratings — social-proof flywheel kicking in
2011-09
⭐
Rating ↓ 4.75 → 4.44 (dropped 0.31★)
2010-12
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.92856★ | 14 | 4.92856★ this version |
| 🇧🇷 BR | 4.3125★ | 16 | 4.3125★ this version |
| 🇨🇦 CA | 4.71429★ | 14 | 4.71429★ this version |
| 🇩🇪 DE | 4.9★ | 10 | 4.9★ this version |
| 🇫🇷 FR | 4.5098★ | 51 | 4.5098★ this version |
| 🇬🇧 GB | 4.78946★ | 19 | 4.78946★ this version |
| 🇮🇳 IN | 4.5625★ | 16 | 4.5625★ this version |
| 🇯🇵 JP | 3.5502★ | 1,245 | 3.5502★ this version |
| 🇺🇸 US | 4.63542★ | 96 | 4.63542★ this version |
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📝 Description
95
BU Score · Transcendent
About this analysis
Why low confidence: only 1 rating · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
SideBooks is a very early-stage iOS app in the food & drink space with weak public traction — only 1 rating, 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 SideBooks make per month?▴
Low-confidence model estimate. SideBooks has only 1 App Store rating, so our revenue model has very little signal to work with — treat the ~$9.8K/mo figure as directional only, not a verified MRR. No founder-verified revenue data is available for this app. See methodology for the formula and confidence bands.
What apps are like SideBooks?▴
Browse the full Food & Drink 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 SideBooks?▴
SideBooks is published by Tatsumi-system 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 SideBooks's BU Score?▴
SideBooks has a BU Score of 55/100 (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.