# SleepMapper vs Hertzy

The clearest difference is in-app purchases: SleepMapper at none against Hertzy's 2. SleepMapper also leads on ads (none vs shown) and iOS requirement (16.6 vs 18.0). Hertzy's advantage is update cadence (fortnightly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Hertzy sells 2 one-off in-app purchases. SleepMapper asks for nothing beyond the download.

SleepMapper ships an update every 2 months, Hertzy fortnightly. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | SleepMapper | Hertzy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3.8K ratings)](https://appshunter.io/ios/app/sleepmapper/id1258577276/reviews)** | — |
| Number of ratings | **3.8K** | — |
| Positive reviews | 30.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 193 MB | 26 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Philips](https://appshunter.io/developer/355645429) | [Mark Kunst](https://appshunter.io/developer/1720564136) |

## What reviewers say

### SleepMapper

[App page](https://appshunter.io/ios/app/sleepmapper/id1258577276)

This app enhances sleep quality by connecting with smart headbands and wake-up lights. It tracks sleep stages, provides soothing audio, and offers smart alarms to improve daytime energy and promote a refreshed awakening.

**Highlights:** Deep sleep enhancement with audio tones, Sleep stage tracking, Smart alarm for gentle waking, Bedroom environment monitoring, Guided wind-down feature, HealthKit integration

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent wake-up light
- 🌙 Helps with sleep
- 👍 Customizable settings
- 🌞 Simulates sunrise/sunset

**What reviewers complain about**

- 🐛 Connectivity issues with app
- 🔌 Unreliable WiFi connection
- 📱 App is buggy and unstable
- 🕰️ Difficult to set up and use

**Reported bugs**

- App won't connect to device
- Alarm settings not saving
- Frequent disconnections and need to reset
- App crashes on launch

**Requested features**

- Integrate with smart home platforms
- Add more sound/music options
- Improve sleep tracking and data analysis
- Allow remote control from anywhere


### Hertzy

[App page](https://appshunter.io/ios/app/hertzy/id6779962320)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |
| Hertzy Pro | $3.99 | one-time |


## Frequently asked questions

### Is SleepMapper free?

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

### Is Hertzy free?

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

### Do SleepMapper or Hertzy have ads?

Hertzy shows ads; SleepMapper does not.

### Which is updated more often, SleepMapper or Hertzy?

SleepMapper ships an update every 2 months, and Hertzy fortnightly. Most recently, SleepMapper was updated on November 11, 2026 and Hertzy on November 10, 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.*