# Study Tracker vs Sleep Cycle Calculator

The clearest difference is rating: Sleep Cycle Calculator at 4.7 against Study Tracker's 4.1. Sleep Cycle Calculator also leads on review sentiment (71% vs 51%). Study Tracker's advantage is update cadence (every 10 days vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Study Tracker sells 2 in-app purchases, starting at $0.99 per month and Sleep Cycle Calculator sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Sleep Cycle Calculator holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 29 and 15 respectively. Written reviews point the same way: 51% of Study Tracker's written reviews are positive against 71% of Sleep Cycle Calculator's.

Study Tracker ships an update every 10 days, Sleep Cycle Calculator every 2 months. The most recent releases landed on October 12, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Study Tracker | Sleep Cycle Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (29 ratings)](https://appshunter.io/ios/app/study-tracker-focus-timer/id1560095006/reviews) | **[4.7 (15 ratings)](https://appshunter.io/ios/app/sleep-cycle-calculator-sounds/id1669183385/reviews)** |
| Number of ratings | **29** | 15 |
| Positive reviews | 50.8% of reviews | **71.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 14 MB | 4 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Gude Aipu Technology Co., Ltd](https://appshunter.io/developer/1896411340) | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) |

## What reviewers say

### Study Tracker

[App page](https://appshunter.io/ios/app/study-tracker-focus-timer/id1560095006)

This app helps you track your study time, set custom courses and plans, and utilize various timers like Pomodoro and countdown for efficient learning. It offers detailed statistics, white noise for focus, and exam countdowns with widgets. Data syncs across devices via iCloud.

**Highlights:** Track study time, Customize courses and study plans, Pomodoro and countdown timers, Detailed study statistics, White noise for focus, Exam countdowns and widgets, Multi-device iCloud sync

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Month) | $0.99 | per month |
| Premium (Lifetime) | $4.99 | one-time |


### Sleep Cycle Calculator

[App page](https://appshunter.io/ios/app/sleep-cycle-calculator-sounds/id1669183385)

This app helps you improve sleep habits by calculating optimal sleep and wake times based on sleep cycles and desired duration. It also offers sleep sounds to aid in falling asleep faster and achieving deeper rest.

**Highlights:** Sleep cycle calculation, Optimal sleep duration calculation, Variety of sleep sounds, User-friendly interface, Subscription for unlimited access

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Subscription | $1.99 | per month |
| 1-Year Subscription | $9.99 | per year |
| Unlock all features | $17.99 | one-time |


## Frequently asked questions

### Is Study Tracker free?

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

### Is Sleep Cycle Calculator free?

Sleep Cycle Calculator is free to download, with in-app purchases available.

### Which has better reviews, Study Tracker or Sleep Cycle Calculator?

Sleep Cycle Calculator is rated higher. Study Tracker averages 4.1 out of 5 from 29 ratings, while Sleep Cycle Calculator averages 4.7 from 15 ratings.

### Do Study Tracker or Sleep Cycle Calculator have ads?

Neither Study Tracker nor Sleep Cycle Calculator shows ads.

### Which is updated more often, Study Tracker or Sleep Cycle Calculator?

Study Tracker ships an update every 10 days, and Sleep Cycle Calculator every 2 months. Most recently, Study Tracker was updated on October 12, 2026 and Sleep Cycle Calculator on September 25, 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.*