Flashcard Hero
by Kitestack Software
- Education
- Paid
- Zombie
- Small & simple · 96
- Rating
- 4.8
- 885 ratings · US storefront
- Top 90%among 64 Education apps
- Last update
- Aug 27, 2025
- Version 3.7.3
- Size
- 8 MB
- Category
- Education
- Tracked since
- Oct 9, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
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.
What’s new
Release notes for the latest version, as written by the developer.
Fixed an issue with verifying App Store purchases
Rank history
Daily position in the Solomon Islands charts. #1 is at the top.
- Best rank
- #2
- Current rank
- #2
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
96/100
Small & simple
- Developer size100% · 25
Developer: 1 app on the charts
- Audience size80% · 20
Ratings: 885
- App size100% · 10
Size: 8 MB
- Price model100% · 15
Price model: paid
- Demand proof100% · 30
Best rank #2, 10 countries
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 3.7.3LatestReleased Aug 27, 2025