71
BU Score
Strong
Stark Kettlebell
✍️ BU Analytics Review
“
Stark Kettlebell is an iOS app from Postra AB in the Health & Fitness category, currently rated 4.7★ across 530 ratings. Initial signal reads as mixed reviews — supporters praise core features while critics cite stability/value gaps.
Our BU Score puts it at 71 — Strong (healthy traction). For a Health & Fitness app, that means healthy traction.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
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 8 of 8 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 | |
| Excellent rating (4.7★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (14y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| Early-stage install base (530 ratings)METRIC | +$400 | |
| Single-language (English only)METRIC | −$400 |
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 →💾 45 MB🔞 4+📱 iOS 15.1+🔖 v3.0.5🔄 updated 4d ago🌐 EN📂 Health & Fitness💰 Paid🚀 Launched 2011 (14y old)
📝 About this app
Optimise your results with Stark Kettlebell!
- Be inspired by 51 exercises presented in sharp HD video.
- Create your own personal workout.
- Get a full body workout with exercises in all ranges of difficulty
- While working out, follow the step by step workout-feature which take you through the workout using timers and your chosen specifics.
- The timers support different workout types including Tabata, HIIT and Circuit training.
- Challenge yourself, get rewards and keep track of your score.
- Find exercises targeting specific muscle groups.
Integration with Apple Health: Save burned calories and performed workouts.
The Kettlebell is well known for the ability to build strength, endurance and explosiveness. Basic exercises like “Swing”, “Snatch” and “Get Up” activate all of your body to give you a great workout!
Exercises are performed by the professional instructor, Andreas Lanker.
- Be inspired by 51 exercises presented in sharp HD video.
- Create your own personal workout.
- Get a full body workout with exercises in all ranges of difficulty
- While working out, follow the step by step workout-feature which take you through the workout using timers and your chosen specifics.
- The timers support different workout types including Tabata, HIIT and Circuit training.
- Challenge yourself, get rewards and keep track of your score.
- Find exercises targeting specific muscle groups.
Integration with Apple Health: Save burned calories and performed workouts.
The Kettlebell is well known for the ability to build strength, endurance and explosiveness. Basic exercises like “Swing”, “Snatch” and “Get Up” activate all of your body to give you a great workout!
Exercises are performed by the professional instructor, Andreas Lanker.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Stark Kettlebell
- Developer
- Postra AB
- Bundle ID
- se.virtualtrainer.VT-Kettlebell-EN
- App Store URL
- Open in App Store
- Category
- Health & Fitness
- Content rating
- 4+
- 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
- $27.3K/mo
- Top-grossing rank
- Outside top 100 in US Health & Fitness
- 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
- Not found
- 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/id1881678740
📈Ratings growth530 ratings+691% lifetimeShow 3-year history estimate ▾
Tracked (59 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.
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