# Spaced Repetition vs FlashHack

The clearest difference is ratings volume: Spaced Repetition at 5 against FlashHack's 1. On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Spaced Repetition sells 3 in-app purchases, starting at $1.99 per month and FlashHack sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Spaced Repetition against 5.0 for FlashHack. That said, the two scores are not equally well evidenced: Spaced Repetition has 5 ratings behind it against 1, so its average is the more settled of the two.

Spaced Repetition ships an update monthly, FlashHack every 3 weeks. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Spaced Repetition | FlashHack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/spaced-repetition-synapse/id6672094098/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/flashhack-ai-flashcards/id6782763586/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 34 MB | 113 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SAMUEL PREMJI](https://appshunter.io/developer/1767673207) | [Luna Wishlist](https://appshunter.io/developer/1737626706) |

## What reviewers say

### Spaced Repetition

[App page](https://appshunter.io/ios/app/spaced-repetition-synapse/id6672094098)

This app simplifies revision planning with a personalized schedule and timely reminders. It offers a calendar view and customizable intervals, eliminating the need for manual flashcard creation. Focus on learning without the stress of organizing your study plan.

**Highlights:** Personalized revision plan creation, Timely revision reminders, Intuitive calendar visualization, Customizable revision intervals, No flashcard creation required

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $1.99 | per month |
| Annual | $9.99 | per year |
| Synapse premium | $29.99 | one-time |


### FlashHack

[App page](https://appshunter.io/ios/app/flashhack-ai-flashcards/id6782763586)

Transform notes and documents into smart study decks with AI-powered flashcards. Utilize spaced repetition for effective learning and ask AI questions directly about your content. Track progress and personalize study materials.

**Highlights:** AI flashcard generation from documents, Spaced repetition study system, Chat Q&A for content-specific questions, Handwritten note scanning, PDF and image uploads, Progress tracking per deck, Customizable flashcards

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlashHack Premium Monthly | $1.99 | per month |
| FlashHack Premium Annual | $13.99 | per year |


## Frequently asked questions

### Is Spaced Repetition free?

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

### Is FlashHack free?

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

### Which has better reviews, Spaced Repetition or FlashHack?

Spaced Repetition and FlashHack are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.

### Do Spaced Repetition or FlashHack have ads?

Neither Spaced Repetition nor FlashHack shows ads.

### Which is updated more often, Spaced Repetition or FlashHack?

Spaced Repetition ships an update monthly, and FlashHack every 3 weeks. Most recently, Spaced Repetition was updated on October 9, 2026 and FlashHack on October 4, 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.*