73
BU Score
Strong
Kartenheld
✍️ BU Analytics Review
“
Kartenheld is an iOS app from Kitestack Software in the News category, currently rated 4.8★ across 873 ratings. Initial signal reads as mixed reviews — supporters praise core features while critics cite stability/value gaps.
Our BU Score puts it at 73 — Strong (healthy traction). For a News 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 10 of 10 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 (4.8★)METRIC | +$2,200 | |
| worth every pennyREVIEW | +$2,000 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (12y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| priceyREVIEW | −$800 | |
| Early-stage install base (873 ratings)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.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Jun 24
Jul 24
Aug 24
Feb 25
Apr 25
Jul 25
⭐ 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 →💾 7 MB🔞 4+📱 iOS 14.1+🔖 v3.7.3🔄 updated 8mo ago🌐 EN, DE📂 News💰 Paid🚀 Launched 2014 (12y old)
📝 About this app
Make your own flash cards and take the pressure out of test preparation. Flashcard Hero keeps track of what facts you already know so you can focus on what you don’t know and save a lot of time.
We made Flashcard Hero for those of you who want to fit more than a few words on each card. You can add images, lists, and use text formatting to structure your content.
- Write cards on your iPhone/iPad
- Add images
- Group cards into topics
- Text formatting & lists
- Find and study only difficult cards
- iCloud Drive support (syncs with the Mac app, which is a separate purchase)
Study Options:
- Memorizing cards by covering the answer
- Multiple Choice tests with randomly picked or predefined answers
- Supports studying with the Spaced Repetition System (Leitner Box System)
For Teachers and Educators:
- Compatible with the Remote Control feature of the Mac app. You can use the iOS app as a remote to control the study mode on the Mac while you are projecting on a big screen.
People use the Flashcard Hero Mac & iOS apps to study many different subjects. Here’s a short list of the most popular subjects based on the over 2 million cards that users have shared among each other so far:
- Medicine (anatomy, physiology, pharmacology, genetics)
- Psychology
- Law & business administration (economics, marketing, international law)
- History and politics
- Languages (Latin, Chinese, Greek, Italian, Spanish, German)
- Social sciences
- Music and music theory
- Space physiology (how cool is that?)
- Many more…
You see a lot of subjects in the top ranks where people have to memorize a lot of “structured” information. That’s because Flashcard Hero is designed specifically to go beyond language learning, offering more room on each card for facts, lists, and images. You can also organize cards into topics (to match chapters of a text book, for example).
Note: This app is a single, one-time purchase. No subscriptions, no in-app purchases, no ads. The App Store might list the app as having in-app purchases, but those are only for backwards compatibility with an earlier version of the app. With this download, you get all features right away.
We made Flashcard Hero for those of you who want to fit more than a few words on each card. You can add images, lists, and use text formatting to structure your content.
- Write cards on your iPhone/iPad
- Add images
- Group cards into topics
- Text formatting & lists
- Find and study only difficult cards
- iCloud Drive support (syncs with the Mac app, which is a separate purchase)
Study Options:
- Memorizing cards by covering the answer
- Multiple Choice tests with randomly picked or predefined answers
- Supports studying with the Spaced Repetition System (Leitner Box System)
For Teachers and Educators:
- Compatible with the Remote Control feature of the Mac app. You can use the iOS app as a remote to control the study mode on the Mac while you are projecting on a big screen.
People use the Flashcard Hero Mac & iOS apps to study many different subjects. Here’s a short list of the most popular subjects based on the over 2 million cards that users have shared among each other so far:
- Medicine (anatomy, physiology, pharmacology, genetics)
- Psychology
- Law & business administration (economics, marketing, international law)
- History and politics
- Languages (Latin, Chinese, Greek, Italian, Spanish, German)
- Social sciences
- Music and music theory
- Space physiology (how cool is that?)
- Many more…
You see a lot of subjects in the top ranks where people have to memorize a lot of “structured” information. That’s because Flashcard Hero is designed specifically to go beyond language learning, offering more room on each card for facts, lists, and images. You can also organize cards into topics (to match chapters of a text book, for example).
Note: This app is a single, one-time purchase. No subscriptions, no in-app purchases, no ads. The App Store might list the app as having in-app purchases, but those are only for backwards compatibility with an earlier version of the app. With this download, you get all features right away.
🆕 What's New · v3.7.3
Fixed an issue with verifying App Store purchases
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Kartenheld
- Developer
- Kitestack Software
- Bundle ID
- com.flashcardhero.mobile
- App Store URL
- Open in App Store
- Category
- News
- Content rating
- 4+
- Languages
- EN, DE
Company
- Website
- flashcardhero.com
- Tagline
- Flashcard Hero for Mac
- Description
- Flashcard Hero is a flash cards app to make flashcards on your Mac. Study on Mac & iPhone/iPad via iCloud. The app keeps track of the study progress for each card and supports Spaced Repetition.
- 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
- $23.6K/mo
- Top-grossing rank
- Outside top 100 in US News
- 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
- http://flashcardhero.com/blog/
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- Not found
📈Ratings growth873 ratings+694% lifetimeShow 3-year history estimate ▾
Tracked (60 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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