# TDDA vs Testr

The clearest difference is update cadence: Testr at every 3 days against TDDA's monthly. TDDA's advantage is iOS requirement (13.4 vs 18.0). 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.

TDDA ships an update monthly, Testr every 3 days. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | TDDA | Testr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/testr-mobile-drug-testing/id6787282930/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | — | Free |
| Size | 30 MB | 17 MB |
| Requires iOS | **13.4** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [INTERNATIONAL DRUG DETECTION AGENCY LIMITED](https://appshunter.io/developer/1660754659) | [Daniel Rimer](https://appshunter.io/developer/1896763479) |

## What reviewers say

### TDDA

[App page](https://appshunter.io/ios/app/tdda/id6553995751)

**Features:** macOS Compatibility

**In-app purchases:** none


### Testr

[App page](https://appshunter.io/ios/app/testr-mobile-drug-testing/id6787282930)

Order certified drug testing conveniently at your location. Track your collector's arrival in real-time and receive your results securely. Suitable for individuals and employers needing rapid or lab-confirmed testing.

**Highlights:** On-demand certified drug testing, Real-time collector tracking, Rapid at-home tests, Lab-confirmed results, Private digital records, Employer dashboard

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

**In-app purchases:** none


## Frequently asked questions

### Is TDDA free?

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

### Is Testr free?

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

### Do TDDA or Testr have ads?

Neither TDDA nor Testr shows ads.

### Which is updated more often, TDDA or Testr?

TDDA ships an update monthly, and Testr every 3 days. Most recently, TDDA was updated on October 13, 2026 and Testr 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.*