# Kanji Time vs Mental Math for Work

The clearest difference is update cadence: Kanji Time at every 4 days against Mental Math for Work's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Kanji Time sells 3 one-off in-app purchases 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.

Kanji Time ships an update every 4 days, Mental Math for Work every 9 days. The most recent releases landed on September 28, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Kanji Time | Mental Math for Work |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Size | 9 MB | 15 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [My Cinema Tools](https://appshunter.io/developer/1579660934) | [Shota Morioka](https://appshunter.io/developer/483674380) |

## What reviewers say

### Kanji Time

[App page](https://appshunter.io/ios/app/kanji-time/id6762405480)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chiisai Tip | $0.99 | one-time |
| Chudo Tip | $2.99 | one-time |
| Okii Tip | $4.99 | 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 Kanji Time free?

Kanji Time 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 Kanji Time or Mental Math for Work have ads?

Neither Kanji Time nor Mental Math for Work shows ads.

### Which is updated more often, Kanji Time or Mental Math for Work?

Kanji Time ships an update every 4 days, and Mental Math for Work every 9 days. Most recently, Kanji Time was updated on September 28, 2026 and Mental Math for Work on October 14, 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.*