# J2K Browser vs Calculator+ 秘密のブラウザとメモ

The clearest difference is in-app purchases: J2K Browser at none against Calculator+ 秘密のブラウザとメモ's 1. J2K Browser also leads on device support (4 vs 2) and iOS requirement (15.5 vs 26.1). Calculator+ 秘密のブラウザとメモ's advantage is update cadence (every 4 days vs every 143 months). On price there is nothing between them.

Both are free to download. Calculator+ 秘密のブラウザとメモ sells 1 one-off in-app purchase. J2K Browser asks for nothing beyond the download.

J2K Browser ships an update every 143 months, Calculator+ 秘密のブラウザとメモ every 4 days. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | J2K Browser | Calculator+ 秘密のブラウザとメモ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 143 months | **Every 4 days** |
| Size | 30 MB | 1 MB |
| Requires iOS | **15.5** | 26.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [leesop.com](https://appshunter.io/developer/567390705) | [Tomo Takahashi](https://appshunter.io/developer/1858509733) |

## What reviewers say

### J2K Browser

[App page](https://appshunter.io/ios/app/j2k-browser/id567390702)

**In-app purchases:** none


### Calculator+ 秘密のブラウザとメモ

[App page](https://appshunter.io/ios/app/calculator-plus/id6756207467)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro版 | $2.99 | one-time |


## Frequently asked questions

### Is J2K Browser free?

J2K Browser is free to download, with no in-app purchases.

### Is Calculator+ 秘密のブラウザとメモ free?

Calculator+ 秘密のブラウザとメモ is free to download, with in-app purchases available.

### Which is updated more often, J2K Browser or Calculator+ 秘密のブラウザとメモ?

J2K Browser ships an update every 143 months, and Calculator+ 秘密のブラウザとメモ every 4 days. Most recently, J2K Browser was updated on October 3, 2026 and Calculator+ 秘密のブラウザとメモ on October 2, 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.*