# 藍眼知識學院 vs Speed calculation

The clearest difference is in-app purchases: 藍眼知識學院 at none against Speed calculation's 1. 藍眼知識學院 also leads on ads (none vs shown) and update cadence (every 2 months vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Speed calculation sells 1 one-off in-app purchase. 藍眼知識學院 asks for nothing beyond the download.

藍眼知識學院 ships an update every 2 months, Speed calculation every 5 months. The most recent releases landed on October 7, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 藍眼知識學院 | Speed calculation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 45 MB | 4 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lan Yan Technology Corp.](https://appshunter.io/developer/1312795161) | [宏斌 樊](https://appshunter.io/developer/1452129040) |

## What reviewers say

### 藍眼知識學院

[App page](https://appshunter.io/ios/app/id1380147993)

**In-app purchases:** none


### Speed calculation

[App page](https://appshunter.io/ios/app/speed-calculation/id1436483686)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads. | $3.99 | one-time |


## Frequently asked questions

### Is 藍眼知識學院 free?

藍眼知識學院 is free to download, with no in-app purchases.

### Is Speed calculation free?

Speed calculation is free to download, with in-app purchases available.

### Do 藍眼知識學院 or Speed calculation have ads?

Speed calculation shows ads; 藍眼知識學院 does not.

### Which is updated more often, 藍眼知識學院 or Speed calculation?

藍眼知識學院 ships an update every 2 months, and Speed calculation every 5 months. Most recently, 藍眼知識學院 was updated on October 7, 2026 and Speed calculation on September 20, 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.*