# SleepHack vs Fever Aid

The clearest difference is ads: Fever Aid at none against SleepHack's shown. SleepHack's advantage is iOS requirement (15.1 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. SleepHack sells 8 in-app purchases, starting at $4.99 per 7 days and Fever Aid sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

SleepHack ships an update every 6 days, Fever Aid weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SleepHack | Fever Aid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sleephack-hack-your-sleep/id6756525549/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 112 MB | 10 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [SMB Studio LLC](https://appshunter.io/developer/1169078419) | [bareum Kim](https://appshunter.io/developer/552310616) |

## What reviewers say

### SleepHack

[App page](https://appshunter.io/ios/app/sleephack-hack-your-sleep/id6756525549)

This app uses adaptive binaural frequencies and an intelligent sleep engine to optimize your sleep cycles for deeper rest and improved performance. It offers performance-first sleep tracking and a smart alarm to wake you at the optimal moment.

**Highlights:** Adaptive binaural frequencies, Intelligent sleep engine, Performance-first sleep tracking, Smart alarm, Deep sleep enhancement modes

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Pro Weekly | $6.99 | per 7 days |
| Pro Monthly | $9.99 | per month |
| Pro Annual | $19.99 | per year |
| Pro Annual | $29.99 | per year |
| Pro Annual | $39.99 | per year |
| Pro Annual | $39.99 | per year |
| Lifetime Access | Free | one-time |


### Fever Aid

[App page](https://appshunter.io/ios/app/fever-aid-medicine-timer/id6796576154)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 개발자에게 커피 도네이션 하기 | $0.99 | one-time |
| 개발자에게 햄버거 도네이션 하기 | $4.99 | one-time |
| 개발자에게 식사 도네이션 하기 | $9.99 | one-time |


## Frequently asked questions

### Is SleepHack free?

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

### Is Fever Aid free?

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

### Do SleepHack or Fever Aid have ads?

SleepHack shows ads; Fever Aid does not.

### Which is updated more often, SleepHack or Fever Aid?

SleepHack ships an update every 6 days, and Fever Aid weekly. Most recently, SleepHack was updated on November 5, 2026 and Fever Aid on October 31, 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.*