# Study Clock vs Revision Tracker

The clearest difference is in-app purchases: Revision Tracker at none against Study Clock's 1. Revision Tracker also leads on ads (none vs shown). Study Clock's advantage is update cadence (every 3 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Study Clock sells 1 one-off in-app purchase. Revision Tracker asks for nothing beyond the download.

Study Clock ships an update every 3 weeks, Revision Tracker every 3 months. The most recent releases landed on September 15, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Study Clock | Revision Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 28 MB | 22 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SnowdropSoft](https://appshunter.io/developer/1541796403) | [Helen Seymour](https://appshunter.io/developer/1836723352) |

## What reviewers say

### Study Clock

[App page](https://appshunter.io/ios/app/study-clock-deep-focus-timer/id6756950093)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Revision Tracker

[App page](https://appshunter.io/ios/app/revision-tracker-studyclock/id6772724234)

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

**In-app purchases:** none


## Frequently asked questions

### Is Study Clock free?

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

### Is Revision Tracker free?

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

### Do Study Clock or Revision Tracker have ads?

Study Clock shows ads; Revision Tracker does not.

### Which is updated more often, Study Clock or Revision Tracker?

Study Clock ships an update every 3 weeks, and Revision Tracker every 3 months. Most recently, Study Clock was updated on September 15, 2026 and Revision Tracker on September 18, 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.*