# Johnson KSA vs Triangle Calc A

The clearest difference is price: Johnson KSA at Free against Triangle Calc A's $0.99. Johnson KSA also leads on update cadence (every 2 months vs every 56 months) and iOS requirement (11.2 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Johnson KSA is free to download; Triangle Calc A costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Johnson KSA ships an update every 2 months, Triangle Calc A every 56 months. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Johnson KSA | Triangle Calc A |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 56 months |
| Size | 57 MB | 0 MB |
| Requires iOS | **11.2** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EraMint](https://appshunter.io/developer/1042043009) | [kohei yamane](https://appshunter.io/developer/1239055575) |

## What reviewers say

### Johnson KSA

[App page](https://appshunter.io/ios/app/johnson-ksa/id1355109775)

**Features:** macOS Compatibility

**In-app purchases:** none


### Triangle Calc A

[App page](https://appshunter.io/ios/app/triangle-calc-a/id1582200016)

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

**In-app purchases:** none


## Frequently asked questions

### Is Johnson KSA free?

Johnson KSA is free to download, with no in-app purchases.

### Is Triangle Calc A free?

Triangle Calc A costs $0.99, with no in-app purchases.

### Do Johnson KSA or Triangle Calc A have ads?

Neither Johnson KSA nor Triangle Calc A shows ads.

### Which is updated more often, Johnson KSA or Triangle Calc A?

Johnson KSA ships an update every 2 months, and Triangle Calc A every 56 months. Most recently, Johnson KSA was updated on September 29, 2026 and Triangle Calc A on October 8, 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.*