# 眼鏡作製技能検定2級 vs Mental Math for Work

The clearest difference is iOS requirement: 眼鏡作製技能検定2級 at 16.0 against Mental Math for Work's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 眼鏡作製技能検定2級 sells 1 one-off in-app purchase and Mental Math for Work sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 眼鏡作製技能検定2級 | Mental Math for Work |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Size | 5 MB | 15 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [Shota Morioka](https://appshunter.io/developer/483674380) |

## What reviewers say

### 眼鏡作製技能検定2級

[App page](https://appshunter.io/ios/app/2/id6758532139)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 眼鏡作製技能検定1級 試験対策 | $1.99 | one-time |


### Mental Math for Work

[App page](https://appshunter.io/ios/app/mental-math-for-work/id6766879948)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is 眼鏡作製技能検定2級 free?

眼鏡作製技能検定2級 is free to download, with in-app purchases available.

### Is Mental Math for Work free?

Mental Math for Work is free to download, with in-app purchases available.

### Do 眼鏡作製技能検定2級 or Mental Math for Work have ads?

Neither 眼鏡作製技能検定2級 nor Mental Math for Work shows ads.

---

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