# Sleepzy vs Fastrack Reflex Vox

The clearest difference is rating: Sleepzy at 4.3 against Fastrack Reflex Vox's 1.7. Sleepzy also leads on ratings volume (22K vs 30) and review sentiment (37% vs 15%). Fastrack Reflex Vox's advantage is in-app purchases (none vs 13) and ads (none vs shown). On price there is nothing between them.

Both are free to download. Sleepzy sells 13 in-app purchases, starting at $3.99 per 7 days. Fastrack Reflex Vox asks for nothing beyond the download.

Sleepzy holds the better App Store score, 4.3 against 1.7. That said, the two scores are not equally well evidenced: Sleepzy has 22K ratings behind it against 30, so its average is the more settled of the two. Written reviews point the same way: 37% of Sleepzy's written reviews are positive against 15% of Fastrack Reflex Vox's.

Sleepzy ships an update monthly, Fastrack Reflex Vox every 4 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sleepzy | Fastrack Reflex Vox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (22K ratings)](https://appshunter.io/ios/app/sleepzy-sleep-cycle-tracker/id1064910141/reviews)** | [1.7 (30 ratings)](https://appshunter.io/ios/app/fastrack-reflex-vox/id1590126291/reviews) |
| Number of ratings | **22K** | 30 |
| Positive reviews | **37.1% of reviews** | 15.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Freemium | **Free** |
| Size | 270 MB | 145 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Mosaic S.r.l.](https://appshunter.io/developer/570748343) | [Titan Company Limited](https://appshunter.io/developer/964406127) |

## What reviewers say

### Sleepzy

[App page](https://appshunter.io/ios/app/sleepzy-sleep-cycle-tracker/id1064910141)

This smart alarm clock tracks sleep patterns, wakes you gently during your lightest sleep phase, and analyzes sleep quality. It provides insights into sleep debt, offers relaxing sounds to help you unwind, and can sync with health apps for comprehensive data tracking.

**Highlights:** Smart alarm wakes you in lightest sleep phase, Sleep pattern tracking and analysis, Sleep debt and quality monitoring, Relaxing sounds and AI music for sleep, Weekly sleep statistics and insights, Snore detection (Premium feature), Syncs with Apple Health

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleepzy Premium 1 Week | $3.99 | per 7 days |
| Sleepzy Premium 1 Month | $4.99 | per month |
| Sleepzy Premium 1 Week | $4.99 | per 7 days |
| Sleepzy Pro | $4.99 | per 7 days |
| Sleepzy Pro | $4.99 | per 7 days |
| Sleepzy Premium 1 Month | $6.99 | per month |
| Sleepzy Premium 1 Month | $6.99 | per month |
| Sleepzy Pro | $7.99 | per 7 days |
| Sleepzy Premium 3 Months | $9.99 | per 3 months |
| Sleepzy Premium 1 Year | $14.99 | per year |
| Sleepzy Premium 1 Year | $29.99 | per year |
| Sleepzy Premium 1 Year | $69.99 | per year |
| Sleepzy Premium 1 Year | $89.99 | per year |

**What reviewers like**

- 🚀 Effective alarm clock
- 👍 Customizable alarm sounds
- 🌙 Sleep tracking features
- 💤 Gradual wake-up process

**What reviewers complain about**

- 🐛 Inaccurate sleep tracking
- 🔋 Drains phone battery
- 🔒 Privacy concerns with microphone
- 💰 Overly aggressive upselling of premium features

**Reported bugs**

- Alarm not going off as scheduled
- App crashing or freezing
- Inconsistent data recording

**Requested features**

- Integration with other sleep/health apps
- More detailed sleep analysis and insights
- Ability to adjust alarm time range
- Nap tracking and alarm


### Fastrack Reflex Vox

[App page](https://appshunter.io/ios/app/fastrack-reflex-vox/id1590126291)

This app syncs with compatible smartwatches to track daily activity, heart rate, SpO2, and sleep patterns. It offers customizable notifications, female health tracking, and smart features like Alexa integration and music control.

**Highlights:** Activity and progress tracking, Heart rate and SpO2 monitoring, Sleep quality analysis, Customizable app notifications, Female health tracking, Smart features (Alexa, music control), Sedentary and hydration reminders

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

**In-app purchases:** none


## Frequently asked questions

### Is Sleepzy free?

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

### Is Fastrack Reflex Vox free?

Fastrack Reflex Vox is free to download, with no in-app purchases.

### Which has better reviews, Sleepzy or Fastrack Reflex Vox?

Sleepzy is rated higher. Sleepzy averages 4.3 out of 5 from 22K ratings, while Fastrack Reflex Vox averages 1.7 from 30 ratings.

### Do Sleepzy or Fastrack Reflex Vox have ads?

Sleepzy shows ads; Fastrack Reflex Vox does not.

### Which is updated more often, Sleepzy or Fastrack Reflex Vox?

Sleepzy ships an update monthly, and Fastrack Reflex Vox every 4 months. Most recently, Sleepzy was updated on October 25, 2026 and Fastrack Reflex Vox 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.*