# FSRS Mobile vs JustFlip

The clearest difference is update cadence: JustFlip at every 5 days against FSRS Mobile's fortnightly. JustFlip also leads on device support (4 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. FSRS Mobile sells 1 one-off in-app purchase and JustFlip sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

FSRS Mobile ships an update fortnightly, JustFlip every 5 days. Both last shipped on October 14, 2026.

## The numbers

| Metric | FSRS Mobile | JustFlip |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/fsrs-mobile-flashcards/id6764139660/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free | — |
| Size | 15 MB | 145 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Timothy Krechel](https://appshunter.io/developer/999539693) | [DANIEL CECH](https://appshunter.io/developer/1896564059) |

## What reviewers say

### FSRS Mobile

[App page](https://appshunter.io/ios/app/fsrs-mobile-flashcards/id6764139660)

A native flashcard app for iPhone and iPad that allows users to import existing decks and study using a spaced repetition system. It supports offline review with local media and offers tools for card creation, editing, and progress tracking.

**Highlights:** Import .apkg deck packages, FSRS spaced repetition study, Offline review with local media, Rich text card creation and editing, Browse and search cards, Track study progress and streaks, Home Screen widgets and reminders

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FSRS Mobile Pro | $6.99 | one-time |


### JustFlip

[App page](https://appshunter.io/ios/app/justflip-flashcards/id6770141421)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JustFlip Pro Monthly | $1.99 | per month |
| JustFlip Pro Yearly | $5.99 | per year |
| JustFlip Pro Lifetime | $12.99 | one-time |


## Frequently asked questions

### Is FSRS Mobile free?

FSRS Mobile is free to download, with in-app purchases available.

### Is JustFlip free?

JustFlip is free to download, with in-app purchases available.

### Do FSRS Mobile or JustFlip have ads?

Neither FSRS Mobile nor JustFlip shows ads.

### Which is updated more often, FSRS Mobile or JustFlip?

FSRS Mobile ships an update fortnightly, and JustFlip every 5 days. Most recently, FSRS Mobile was updated on October 14, 2026 and JustFlip on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*