# IDT Data Logger vs CertMate

The clearest difference is update cadence: CertMate at weekly against IDT Data Logger's every 11 months. IDT Data Logger's advantage is iOS requirement (12.0 vs 17.0). 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.

IDT Data Logger ships an update every 11 months, CertMate weekly. The most recent releases landed on September 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | IDT Data Logger | CertMate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/idt-data-logger/id1555614905/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Weekly** |
| Monetization | Free | — |
| Size | 8 MB | 18 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Instruments & Data Tools Pty Ltd](https://appshunter.io/developer/1477164406) | [Aevi Tech Pty Ltd](https://appshunter.io/developer/1681709376) |

## What reviewers say

### IDT Data Logger

[App page](https://appshunter.io/ios/app/idt-data-logger/id1555614905)

Manually record data points using user-defined labels and NFC tags. Capture tag information like number and description alongside your collected data. Share your recorded information across devices via AirDrop.

**Highlights:** Manual data recording, User-defined labels, NFC tag integration, Capture tag number and description, Data sharing via AirDrop

**Features:** macOS Compatibility

**In-app purchases:** none


### CertMate

[App page](https://appshunter.io/ios/app/certmate/id6447545377)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is IDT Data Logger free?

IDT Data Logger is free to download, with no in-app purchases.

### Is CertMate free?

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

### Do IDT Data Logger or CertMate have ads?

Neither IDT Data Logger nor CertMate shows ads.

### Which is updated more often, IDT Data Logger or CertMate?

IDT Data Logger ships an update every 11 months, and CertMate weekly. Most recently, IDT Data Logger was updated on September 24, 2026 and CertMate on October 14, 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.*