# Stretch Timer Interval HIIT vs NatureVoice(BGM For Sleep)

The clearest difference is price: Stretch Timer Interval HIIT at Free against NatureVoice(BGM For Sleep)'s $0.99. NatureVoice(BGM For Sleep)'s advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Stretch Timer Interval HIIT is free to download; NatureVoice(BGM For Sleep) costs $0.99 up front. Stretch Timer Interval HIIT sells 2 in-app purchases, starting at $3.99 per month. NatureVoice(BGM For Sleep) asks for nothing beyond the download.

Stretch Timer Interval HIIT ships an update every 2 weeks, NatureVoice(BGM For Sleep) every 8 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Stretch Timer Interval HIIT | NatureVoice(BGM For Sleep) |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/stretch-timer-interval-hiit/id6482106910/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 259 MB | 162 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NilCraft Inc.](https://appshunter.io/developer/458823527) | [SINN MIRAI, K.K.](https://appshunter.io/developer/1727483219) |

## What reviewers say

### Stretch Timer Interval HIIT

[App page](https://appshunter.io/ios/app/stretch-timer-interval-hiit/id6482106910)

This app helps you build and maintain a consistent stretching routine. Customize your workouts with adjustable sets and times, track your progress with a calendar view, and enjoy a user-friendly interface with dark mode support. It's designed to make daily stretching an effortless habit.

**Highlights:** Customizable sets and times, Multiple stretching menus, Calendar history view, Adjustable sound effects, Dark mode support, Automatic backup (premium)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features | $3.99 | per month |
| Premium features | $39.99 | per year |


### NatureVoice(BGM For Sleep)

[App page](https://appshunter.io/ios/app/naturevoicebgm-for-sleep/id6747785597)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stretch Timer Interval HIIT free?

Stretch Timer Interval HIIT is free to download, with in-app purchases available.

### Is NatureVoice(BGM For Sleep) free?

NatureVoice(BGM For Sleep) costs $0.99, with no in-app purchases.

### Do Stretch Timer Interval HIIT or NatureVoice(BGM For Sleep) have ads?

Stretch Timer Interval HIIT shows ads; NatureVoice(BGM For Sleep) does not.

### Which is updated more often, Stretch Timer Interval HIIT or NatureVoice(BGM For Sleep)?

Stretch Timer Interval HIIT ships an update every 2 weeks, and NatureVoice(BGM For Sleep) every 8 days. Most recently, Stretch Timer Interval HIIT was updated on October 24, 2026 and NatureVoice(BGM For Sleep) on October 11, 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.*