# 体重管理BMI vs 小脚印 Footprint

The clearest difference is ads: 小脚印 Footprint at none against 体重管理BMI's shown. 体重管理BMI's advantage is update cadence (daily vs every 3 days) and iOS requirement (13.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 体重管理BMI sells 3 in-app purchases, starting at $3.99 per month and 小脚印 Footprint sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

体重管理BMI ships an update daily, 小脚印 Footprint every 3 days. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 体重管理BMI | 小脚印 Footprint |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 3 days |
| Size | 31 MB | 4 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [良来 姜](https://appshunter.io/developer/1635476455) | [雪苗 林](https://appshunter.io/developer/1800587536) |

## What reviewers say

### 体重管理BMI

[App page](https://appshunter.io/ios/app/bmi/id6745217207)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 体重管理BMI月度高级账号订阅 | $3.99 | per month |
| 体重管理BMI季度会员高级账号 | $7.99 | per 3 months |
| 体重管理BMI年度会员高级帐户 | $9.99 | per year |


### 小脚印 Footprint

[App page](https://appshunter.io/ios/app/footprint/id6755595490)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度订阅 | $0.99 | per month |


## Frequently asked questions

### Is 体重管理BMI free?

体重管理BMI is free to download, with in-app purchases available.

### Is 小脚印 Footprint free?

小脚印 Footprint is free to download, with in-app purchases available.

### Do 体重管理BMI or 小脚印 Footprint have ads?

体重管理BMI shows ads; 小脚印 Footprint does not.

### Which is updated more often, 体重管理BMI or 小脚印 Footprint?

体重管理BMI ships an update daily, and 小脚印 Footprint every 3 days. Most recently, 体重管理BMI was updated on October 7, 2026 and 小脚印 Footprint on October 6, 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.*