# LEFT Sleep Position Trainer — Train to sleep on your left

> Train to sleep on your left (iPhone/iPad app by Side Sleep Technologies BV.)

- Source: https://appshunter.io/ios/app/left-sleep-position-trainer/id1490471203 (this page in markdown: same URL + `.md`)
- Developer: [Side Sleep Technologies BV](https://appshunter.io/developer/1494478629)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 17 MB
- Languages: Dutch, English
- Released: 2020-01-10
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/left-sleep-position-trainer/id1490471203/reviews.md

## What is LEFT Sleep Position Trainer?

The app is used to connect with the LEFT device via Bluetooth and extract the positional data per night. LEFT is a small non-invasive sleep position training device that trains the user predominately to sleep on the left side. 

CONNECT: Connect your LEFT device via Bluetooth to view your sleep data. The device Bluetooth is off during the nighttime tracking.

TRACK: Find out on which side you slept most over the night. The LEFT device will record all your sleeping positions like Back, Belly, Left, Right, Straight-up. 

PROGRESS: See your progress night by night. Quicky view your progress while the LEFT device trains you to sleep on the left side as often as possible.  

EXPORT: Export your individual night or all night sleeping data in CSV format.


## Version history (last 4 releases)

### 2.1 — 2020-07-07

This update includes app performance improvements and minor bug fixes. 

Thank you for using LEFT and we're looking forward to your feedback.

### 2.0 — 2020-04-16

Welcome to LEFT App version 2.0. In this major update we included: 
- Added the functionality to wirelessly update the software on the LEFT Device for you to enjoy the latest features.
- Added an introduction to the LEFT Device
- Online Backup - never lose your data
- Private Account - see your data on multiple devices
- Now you can control the setting of LEFT Device and choose the best option for you 
- Out of stickers? Order them directly through the app. 

If you have a suggestion or need support, please click the button "Send Feedback & Support" in the Account section. 

Thank you for using LEFT and we're looking forward to your feedback.

### 1.0.1 — 2019-12-26

In this update we: 
- Improved user experience and design to help you reduce painful acid reflux with LEFT wearable and app
- fixed minors bugs

Thank you for using LEFT and we're looking forward to your feedback.

### 1.0.0 — 2019-12-22

No release notes.

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## More apps by Side Sleep Technologies BV

- [SNOOOR Sleep Position Device](https://appshunter.io/ios/app/snooor-sleep-position-device/id1521001705)
- [TheLeft-SleepPositionalTrainer](https://appshunter.io/ios/app/theleft-sleeppositionaltrainer/id6443869099)

All apps by Side Sleep Technologies BV: https://appshunter.io/developer/1494478629

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*