# FlexiAlarm vs SleepHack

The clearest difference is price: SleepHack at Free against FlexiAlarm's $4.99. SleepHack also leads on review sentiment (100% vs 75%) and iOS requirement (15.1 vs 26.2). FlexiAlarm's advantage is in-app purchases (none vs 8) and ads (none vs shown). On rating, update cadence and device support there is nothing between them.

SleepHack is free to download; FlexiAlarm costs $4.99 up front. SleepHack sells 8 in-app purchases, starting at $4.99 per 7 days. FlexiAlarm asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for FlexiAlarm against 5.0 for SleepHack. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews are what separate them: 75% of FlexiAlarm's written reviews are positive against 100% of SleepHack's.

FlexiAlarm ships an update every 8 days, SleepHack every 6 days. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | FlexiAlarm | SleepHack |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/flexialarm-watch-alarm/id6502886443/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sleephack-hack-your-sleep/id6756525549/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Every 6 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 17 MB | 112 MB |
| Requires iOS | 26.2 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Nathan Woolmore](https://appshunter.io/developer/1530667458) | [SMB Studio LLC](https://appshunter.io/developer/1169078419) |

## What reviewers say

### FlexiAlarm

[App page](https://appshunter.io/ios/app/flexialarm-watch-alarm/id6502886443)

This smart alarm app for Apple Watch offers extensive customization for wake-up experiences. It features intelligent sleep phase timing, adjustable vibration, and a power nap mode, all designed for a more refreshed start to your day.

**Highlights:** Customizable wake window, snooze, and vibration, Intelligent smart wake (sleep phase timing), Vibration-only alarm, Power nap mode, Apple Health integration, Lucid dream alarm mode, Watch face complications and widgets

**Features:** Apple Watch app

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is FlexiAlarm free?

FlexiAlarm costs $4.99, with no in-app purchases.

### Is SleepHack free?

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

### Which has better reviews, FlexiAlarm or SleepHack?

FlexiAlarm and SleepHack are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do FlexiAlarm or SleepHack have ads?

SleepHack shows ads; FlexiAlarm does not.

### Which is updated more often, FlexiAlarm or SleepHack?

FlexiAlarm ships an update every 8 days, and SleepHack every 6 days. Most recently, FlexiAlarm was updated on October 7, 2026 and SleepHack on October 6, 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.*