# i vs DET Data Logger

The clearest difference is update cadence: DET Data Logger at every 2 weeks against i's every 4 months. i's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.5). On price, 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.

i ships an update every 4 months, DET Data Logger every 2 weeks. The most recent releases landed on November 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | i | DET Data Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/i-attend-self-check-in/id1421201302/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Subscription | — |
| Size | 22 MB | 1 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [TNETIC, Inc.](https://appshunter.io/developer/982489937) | [DragonEye Technology](https://appshunter.io/developer/1865230033) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-attend-self-check-in/id1421201302)

This app allows event attendees to self-check in and out using their mobile devices. It connects with a cloud-based platform for attendance tracking, name badge creation, and certificate generation.

**Highlights:** Self check-in/out, Event QR code scanning, Event PIN entry, Attendance tracking, Name badge creation, Certificate generation

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

**In-app purchases:** none


### DET Data Logger

[App page](https://appshunter.io/ios/app/det-data-logger/id6757201305)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is i free?

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

### Is DET Data Logger free?

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

### Do i or DET Data Logger have ads?

Neither i nor DET Data Logger shows ads.

### Which is updated more often, i or DET Data Logger?

i ships an update every 4 months, and DET Data Logger every 2 weeks. Most recently, i was updated on November 2, 2026 and DET Data Logger on October 28, 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.*