41
BU Score
Emerging
RadioactivityCounter
✍️ bumetric analysis
“
RadioactivityCounter is an iOS app from Dipl.-Ing. Rolf-Dieter Klein in the Utilities category, currently rated 3.1★ across 10 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Our BU Score puts it at 41: Emerging (early traction worth watching). For a Utilities app, that means early traction worth watching.
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
—
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 6 of 6 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 appREVIEW | +$1,500 | |
| Below-average rating (3.1★)METRIC | −$1,500 | |
| Mature app (14y old)METRIC | +$1,500 | |
| Single-language (English only)METRIC | −$400 | |
| Pre-traction phase (10 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.
App Specs
🔐 Own this app? Claim & verify MRR →💾 11 MB🔞 4+📱 iOS 8.0+🔖 v2.2🔄 updated 9y ago🌐 EN📂 Utilities💰 Paid🚀 Launched 2012 (14y old)
📝 About this app
RadioactivityCounter
This application is a real working radioactivity counter without any extra hardware needed ! It will turn your phone into a Geiger Müller Counter to measure radioactivity after proper calibration.
** Attention after upgrading iOS to a higher iOS do the calibrate again, as camera data properties might have changed **
Disclaimer: The type of radiation picked up by the camera can be dangerous/detrimental to the user's health as well as cause damage to the device.… View full description on the official store →
This application is a real working radioactivity counter without any extra hardware needed ! It will turn your phone into a Geiger Müller Counter to measure radioactivity after proper calibration.
** Attention after upgrading iOS to a higher iOS do the calibrate again, as camera data properties might have changed **
Disclaimer: The type of radiation picked up by the camera can be dangerous/detrimental to the user's health as well as cause damage to the device.… View full description on the official store →
🆕 What's New · v2.2
This update from Apple will improve the functionality of this app. No new features are included.
Rev 2.2. New algorithm for more stable camera cold starts, needs less recalibration, bugfix on unkown devices, and experimental upload function for statistics.… Full release notes →
Rev 2.2. New algorithm for more stable camera cold starts, needs less recalibration, bugfix on unkown devices, and experimental upload function for statistics.… Full release notes →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- RadioactivityCounter
- Developer
- Dipl.-Ing. Rolf-Dieter Klein
- Bundle ID
- com.rdklein.RadioactivityCounter
- App Store URL
- Open in App Store
- Category
- Utilities
- Content rating
- 4+
- Languages
- EN
Company
- Website
- www.hotray-data.de
- 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
- $8.7K/mo
- Top-grossing rank
- Outside top 100 in US Utilities
- 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
- Not found
⭐Recent App Store Reviews10 latest · avg 3.3★ · 50.0% 5★ · 40.0% 1★
5★5 (50%)
4★1 (10%)
3★0 (0%)
2★0 (0%)
1★4 (40%)
+0 ratings/week
Praise: great ×3 amazing ×2 awesome ×1 excellent ×1Complaints: refund ×1
Top positive
★★★★★ Amazing sensor usage; not fake
Hats off to the developer for implementing a real measurement tool for radioactivity. Visit his website to see his calibration data, I know that measurements from my iPhone 6p matched my 'real' instrument by detecting faint radiat…
★★★★★ Amazing
I have this app on my iPhone 4 and 5s and it works great! I just downloaded it to my iPad Air but have yet to try it...will update. I had to look under iPhone apps only to download it to my iPad though.…
Top negative
★☆☆☆☆ Failed me in my time of need
I am in an intro to nuclear engineering class and I had to detect the number of gamma counts that a smoke detector would give off. I used this app, thinking nothing of it, but the second I put the tape on the cameras, I was greeted by 0 CPM…
★☆☆☆☆ None of this made sense!
I tried to use the app to check to see if any of the rocks I have been collecting show any signs of radiation. This description made this app look like what I needed. I dropped the $7, and have NEVER been so disappointed.
Nothing is in any…
📈Ratings growth10 ratings+900% lifetimeShow 3-year history estimate ▾
Tracked (12 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 RadioactivityCounter: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.