# SleepMapper vs BU updater

The clearest difference is device support: BU updater at 3 against SleepMapper's 1. BU updater also leads on iOS requirement (13.0 vs 16.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SleepMapper ships an update every 2 months, BU updater every 6 weeks. The most recent releases landed on September 28, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | SleepMapper | BU updater |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 193 MB | 30 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Philips](https://appshunter.io/developer/355645429) | [Essence Future Living 2010 Ltd.](https://appshunter.io/developer/1665873280) |

## 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


### BU updater

[App page](https://appshunter.io/ios/app/bu-updater/id1665873278)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SleepMapper free?

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

### Is BU updater free?

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

### Do SleepMapper or BU updater have ads?

Neither SleepMapper nor BU updater shows ads.

### Which is updated more often, SleepMapper or BU updater?

SleepMapper ships an update every 2 months, and BU updater every 6 weeks. Most recently, SleepMapper was updated on September 28, 2026 and BU updater on May 17, 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.*