# HT体脂秤 vs Reaction Light Trainer

The clearest difference is in-app purchases: HT体脂秤 at none against Reaction Light Trainer's 2. HT体脂秤 also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). Reaction Light Trainer's advantage is update cadence (every 2 weeks vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Reaction Light Trainer sells 2 in-app purchases, starting at $2.99 per year. HT体脂秤 asks for nothing beyond the download.

HT体脂秤 ships an update every 5 weeks, Reaction Light Trainer every 2 weeks. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HT体脂秤 | Reaction Light Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Size | 5 MB | 46 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Holtek Semiconductor(China) Inc](https://appshunter.io/developer/1052056181) | [zhenyu song](https://appshunter.io/developer/1721282851) |

## What reviewers say

### HT体脂秤

[App page](https://appshunter.io/ios/app/ht/id1138550740)

**In-app purchases:** none


### Reaction Light Trainer

[App page](https://appshunter.io/ios/app/reaction-light-trainer-reflex/id6778074866)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Yearly) | $2.99 | per year |
| Remove Ads | $6.99 | one-time |


## Frequently asked questions

### Is HT体脂秤 free?

HT体脂秤 is free to download, with no in-app purchases.

### Is Reaction Light Trainer free?

Reaction Light Trainer is free to download, with in-app purchases available.

### Do HT体脂秤 or Reaction Light Trainer have ads?

Reaction Light Trainer shows ads; HT体脂秤 does not.

### Which is updated more often, HT体脂秤 or Reaction Light Trainer?

HT体脂秤 ships an update every 5 weeks, and Reaction Light Trainer every 2 weeks. Most recently, HT体脂秤 was updated on October 10, 2026 and Reaction Light Trainer on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*