# Study Reserve vs Spaced Repetition

The clearest difference is in-app purchases: Study Reserve at none against Spaced Repetition's 3. Study Reserve also leads on update cadence (every 11 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Spaced Repetition sells 3 in-app purchases, starting at $1.99 per month. Study Reserve asks for nothing beyond the download.

Study Reserve ships an update every 11 days, Spaced Repetition monthly. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Study Reserve | Spaced Repetition |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (6 ratings)](https://appshunter.io/ios/app/spaced-repetition-synapse/id6672094098/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 87.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 34 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sudeheera Kumarasinghe](https://appshunter.io/developer/1557684299) | [SAMUEL PREMJI](https://appshunter.io/developer/1767673207) |

## What reviewers say

### Study Reserve

[App page](https://appshunter.io/ios/app/study-reserve/id6503342135)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Study Reserve free?

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

### Is Spaced Repetition free?

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

### Do Study Reserve or Spaced Repetition have ads?

Neither Study Reserve nor Spaced Repetition shows ads.

### Which is updated more often, Study Reserve or Spaced Repetition?

Study Reserve ships an update every 11 days, and Spaced Repetition monthly. Most recently, Study Reserve was updated on October 9, 2026 and Spaced Repetition on October 24, 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.*