53
BU Score
Solid
Human Skeleton Reference Guide
✍️ bumetric analysis
“
Human Skeleton Reference Guide is an iOS app from Ryan Bittorf in the Education category, currently rated 4.0★ across 5 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Our BU Score puts it at 53: Solid (established niche player). For a Education app, that means established niche player.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
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Rating
—
Reviews
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Forecast Revenue / mo
—
Snapshots tracked
0
since first record
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 7 of 7 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 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (10y old)METRIC | +$1,500 | |
| Good rating (4.0★)METRIC | +$800 | |
| Single-language (English only)METRIC | −$400 | |
| Pre-traction phase (5 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.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 10 MB🔞 12+📱 iOS 15.0+🔖 v2.2.0🔄 updated 3y ago🌐 EN📂 Education💰 Paid🚀 Launched 2015 (10y old)
📝 About this app
A beautifully designed reference guide of the human skeletal system. Detailed descriptions of bone anatomy are viewable from the anterior, posterior or lateral perspectives. See all labelling at a glance. Navigate through the entire skeleton swiftly.
Regions of Skeleton include:
Head (Skull / Teeth)
Torso (Rib Cage / Vertebrae)
Shoulder (Scapula / Clavicle / Humerus)
Forearm (Ulna / Radius)
Hand (Carpals / Metacarpals / Phalanges)
Thigh (Pelvis / Femur / Patella)
Shin (Tibia / Fibula)
Foot (Tarsals / Metatarsals / Phalanges)
Regions of Skeleton include:
Head (Skull / Teeth)
Torso (Rib Cage / Vertebrae)
Shoulder (Scapula / Clavicle / Humerus)
Forearm (Ulna / Radius)
Hand (Carpals / Metacarpals / Phalanges)
Thigh (Pelvis / Femur / Patella)
Shin (Tibia / Fibula)
Foot (Tarsals / Metatarsals / Phalanges)
🆕 What's New · v2.2.0
UI enhances for both iPhone and iPad
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Human Skeleton Reference Guide
- Developer
- Ryan Bittorf
- Bundle ID
- com.ryanbittorf.Skeleton
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- 12+
- Languages
- EN
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
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $19.0K/mo
- Top-grossing rank
- Outside top 99 in US Education
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- https://apps.apple.com/us/app/letterloop-group-newsletters/id6468623700
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- https://apps.apple.com/us/iphone/story/id1648916522
📈Ratings growth5 ratings+400% lifetimeShow 3-year history estimate ▾
Tracked (4 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.
Full revenue analysis
Read the article-style breakdown for Human Skeleton Reference Guide: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.