# ETF计算器 vs 天天小牛

The clearest difference is in-app purchases: ETF计算器 at none against 天天小牛's 2. ETF计算器 also leads on update cadence (weekly vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 天天小牛 sells 2 one-off in-app purchases. ETF计算器 asks for nothing beyond the download.

ETF计算器 ships an update weekly, 天天小牛 every 7 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ETF计算器 | 天天小牛 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 7 months |
| Size | 14 MB | 61 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [治波 王](https://appshunter.io/developer/1744485157) | [Hefei Maniu Software Technology Co., Ltd.](https://appshunter.io/developer/1806533752) |

## What reviewers say

### ETF计算器

[App page](https://appshunter.io/ios/app/etf/id6742107253)

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

**In-app purchases:** none


### 天天小牛

[App page](https://appshunter.io/ios/app/id6744204824)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 数据服务（年） | $29.99 | one-time |
| 至尊会员 PRO | $69.99 | one-time |


## Frequently asked questions

### Is ETF计算器 free?

ETF计算器 is free to download, with no in-app purchases.

### Is 天天小牛 free?

天天小牛 is free to download, with in-app purchases available.

### Do ETF计算器 or 天天小牛 have ads?

Neither ETF计算器 nor 天天小牛 shows ads.

### Which is updated more often, ETF计算器 or 天天小牛?

ETF计算器 ships an update weekly, and 天天小牛 every 7 months. Most recently, ETF计算器 was updated on October 25, 2026 and 天天小牛 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.*