# AlgoApp vs On

The clearest difference is in-app purchases: On at none against AlgoApp's 4. AlgoApp's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. AlgoApp sells 4 in-app purchases, starting at $9.99 per month. On asks for nothing beyond the download.

AlgoApp ships an update every 4 days, On every 5 days. The most recent releases landed on October 26, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | AlgoApp | On |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (20K ratings)](https://appshunter.io/ios/app/algoapp-flashcards/id689185915/reviews)** | — |
| Number of ratings | **20K** | — |
| Positive reviews | 49.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 408 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [AlgoApp Inc](https://appshunter.io/developer/689185918) | [Luana Thomas](https://appshunter.io/developer/1688608260) |

## What reviewers say

### AlgoApp

[App page](https://appshunter.io/ios/app/algoapp-flashcards/id689185915)

This app helps you learn languages or study for tests using advanced flashcards. It offers automatic translation, text-to-speech, AI-powered PDF conversion, and offline access. Sync your progress across devices and organize your study materials with folders.

**Highlights:** Automatic translation for 120 languages, Text-to-speech for 39 languages, AI PDF to flashcard conversion, Offline study mode, Cross-device sync, FSRS spaced repetition algorithm, Anki deck import

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited: 1-Month | $9.99 | per month |
| AnkiApp Unlimited | $24.99 | per year |
| Unlimited: 1-Year | $29.99 | per year |
| Unlimited: Lifetime | $149.99 | one-time |

**What reviewers like**

- 👍 Efficient flashcard creation and review
- 🚀 Sleek and user-friendly interface
- 💡 Useful AI-powered features
- 🚀 Convenient cross-device syncing
- 👍 Effective spaced repetition algorithm

**What reviewers complain about**

- 🐛 Frequent glitches and bugs
- 🔒 Lack of transparency around paid features
- 🐛 Syncing and data loss issues
- 🐛 Unreliable audio playback
- 🐛 Confusing and unintuitive UI changes

**Reported bugs**

- Cards disappearing from decks
- Inability to log in or sync across devices
- Formatting issues when copying/pasting text
- Inconsistent behavior when editing cards
- Frequent app crashes and freezes

**Requested features**

- Ability to edit/customize downloaded decks
- Option to review cards in creation order
- Customizable daily study limits
- Global search across all decks
- Markdown support and rich text formatting


### On

[App page](https://appshunter.io/ios/app/on-key/id6470926583)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AlgoApp free?

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

### Is On free?

On is free to download, with no in-app purchases.

### Do AlgoApp or On have ads?

Neither AlgoApp nor On shows ads.

### Which is updated more often, AlgoApp or On?

AlgoApp ships an update every 4 days, and On every 5 days. Most recently, AlgoApp was updated on October 26, 2026 and On 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.*