# Wind Diagnostics vs COLT 4

The clearest difference is update cadence: COLT 4 at monthly against Wind Diagnostics's every 5 months. Wind Diagnostics's advantage is iOS requirement (9.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Wind Diagnostics ships an update every 5 months, COLT 4 monthly. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Wind Diagnostics | COLT 4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Size | 87 MB | 155 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siemens Energy](https://appshunter.io/developer/1539380213) | [Straightpoint](https://appshunter.io/developer/1232597225) |

## What reviewers say

### Wind Diagnostics

[App page](https://appshunter.io/ios/app/wind-diagnostics/id986823931)

**Features:** macOS Compatibility

**In-app purchases:** none


### COLT 4

[App page](https://appshunter.io/ios/app/colt-4/id6736948101)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Wind Diagnostics free?

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

### Is COLT 4 free?

COLT 4 is free to download, with no in-app purchases.

### Do Wind Diagnostics or COLT 4 have ads?

Neither Wind Diagnostics nor COLT 4 shows ads.

### Which is updated more often, Wind Diagnostics or COLT 4?

Wind Diagnostics ships an update every 5 months, and COLT 4 monthly. Most recently, Wind Diagnostics was updated on October 6, 2026 and COLT 4 on October 5, 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.*