# TMA vs Duncan Drill Calibration

The clearest difference is update cadence: TMA at every 9 days against Duncan Drill Calibration's every 8 months. TMA also leads on iOS requirement (10.0 vs 15.1). 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.

TMA ships an update every 9 days, Duncan Drill Calibration every 8 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | TMA | Duncan Drill Calibration |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 8 months |
| Size | 82 MB | 34 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TracMap](https://appshunter.io/developer/1338597371) | [Giltrap Engineering Ltd](https://appshunter.io/developer/1593495399) |

## What reviewers say

### TMA

[App page](https://appshunter.io/ios/app/tma/id1441574190)

**In-app purchases:** none


### Duncan Drill Calibration

[App page](https://appshunter.io/ios/app/duncan-drill-calibration/id6444295647)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TMA free?

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

### Is Duncan Drill Calibration free?

Duncan Drill Calibration is free to download, with no in-app purchases.

### Do TMA or Duncan Drill Calibration have ads?

Neither TMA nor Duncan Drill Calibration shows ads.

### Which is updated more often, TMA or Duncan Drill Calibration?

TMA ships an update every 9 days, and Duncan Drill Calibration every 8 months. Most recently, TMA was updated on October 26, 2026 and Duncan Drill Calibration on October 27, 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.*