# Simple Training Timer vs Hearth あなただけのAIメンター

The clearest difference is ads: Hearth あなただけのAIメンター at none against Simple Training Timer's shown. Hearth あなただけのAIメンター also leads on update cadence (daily vs every 3 weeks) and iOS requirement (15.1 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Simple Training Timer sells 1 in-app purchase, starting at $1.99 per month and Hearth あなただけのAIメンター sells 7 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

Simple Training Timer ships an update every 3 weeks, Hearth あなただけのAIメンター daily. Both last shipped on October 24, 2026.

## The numbers

| Metric | Simple Training Timer | Hearth あなただけのAIメンター |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (63 ratings)](https://appshunter.io/ios/app/simple-training-timer-stt/id1263269081/reviews)** | — |
| Number of ratings | **63** | — |
| Positive reviews | 69.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 31 MB | 53 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [EasterEggs](https://appshunter.io/developer/553389214) | [Gentaro Yamamoto](https://appshunter.io/developer/1891223807) |

## What reviewers say

### Simple Training Timer

[App page](https://appshunter.io/ios/app/simple-training-timer-stt/id1263269081)

This app helps with daily strength training by accurately timing workouts, rest periods, and sets. Customize various training menus to suit your fitness goals and enjoy more fulfilling exercise sessions.

**Highlights:** Accurate workout timing, Rest period tracking, Set and repetition count, Customizable training menus, Daily strength training assistance

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $1.99 | per month |


### Hearth あなただけのAIメンター

[App page](https://appshunter.io/ios/app/hearth-ai/id6761741766)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額プラン | $19.99 | per month |
| 年額プラン | $119.99 | per year |
| 3コイン | $0.99 | one-time |
| 10コイン | $2.99 | one-time |
| 30コイン | $7.99 | one-time |
| 50コイン | $11.99 | one-time |
| 100コイン | $19.99 | one-time |


## Frequently asked questions

### Is Simple Training Timer free?

Simple Training Timer is free to download, with in-app purchases available.

### Is Hearth あなただけのAIメンター free?

Hearth あなただけのAIメンター is free to download, with in-app purchases available.

### Do Simple Training Timer or Hearth あなただけのAIメンター have ads?

Simple Training Timer shows ads; Hearth あなただけのAIメンター does not.

### Which is updated more often, Simple Training Timer or Hearth あなただけのAIメンター?

Simple Training Timer ships an update every 3 weeks, and Hearth あなただけのAIメンター daily. Most recently, Simple Training Timer was updated on October 24, 2026 and Hearth あなただけのAIメンター 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.*