# Johnson KSA vs WTCO

The clearest difference is iOS requirement: Johnson KSA at 11.2 against WTCO's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Johnson KSA ships an update every 2 months, WTCO monthly. The most recent releases landed on September 29, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Johnson KSA | WTCO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 57 MB | 95 MB |
| Requires iOS | **11.2** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [EraMint](https://appshunter.io/developer/1042043009) | [WATER TRANSMISSION AND TECHNOLOGIES COMPANY](https://appshunter.io/developer/1676931703) |

## What reviewers say

### Johnson KSA

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

**Features:** macOS Compatibility

**In-app purchases:** none


### WTCO

[App page](https://appshunter.io/ios/app/wtco/id6446695139)

**Features:** macOS Compatibility, Apple Wallet, 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 WTCO free?

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

### Do Johnson KSA or WTCO have ads?

Neither Johnson KSA nor WTCO shows ads.

### Which is updated more often, Johnson KSA or WTCO?

Johnson KSA ships an update every 2 months, and WTCO monthly. Most recently, Johnson KSA was updated on September 29, 2026 and WTCO on October 11, 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.*