# AUTHADA vs Sim2day

The clearest difference is update cadence: Sim2day at fortnightly against AUTHADA's every 2 months. 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.

AUTHADA ships an update every 2 months, Sim2day fortnightly. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | AUTHADA | Sim2day |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 76.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 15 MB | 21 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Authada GmbH](https://appshunter.io/developer/1314423801) | [Sim2day](https://appshunter.io/developer/1840183978) |

## What reviewers say

### AUTHADA

[App page](https://appshunter.io/ios/app/authada/id1479685801)

Securely identify yourself online using your German identity card or residence permit. The app guides you through the process of reading your ID and entering necessary codes for verification.

**Highlights:** Online identification with German ID card, Uses NFC for data reading, PIN and TAN entry for verification, PIN change and unlock functionality, Privacy-focused with BSI certification, Accessible design

**In-app purchases:** none


### Sim2day

[App page](https://appshunter.io/ios/app/sim2day/id6752615290)

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

**In-app purchases:** none


## Frequently asked questions

### Is AUTHADA free?

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

### Is Sim2day free?

Sim2day is free to download, with no in-app purchases.

### Do AUTHADA or Sim2day have ads?

Neither AUTHADA nor Sim2day shows ads.

### Which is updated more often, AUTHADA or Sim2day?

AUTHADA ships an update every 2 months, and Sim2day fortnightly. Most recently, AUTHADA was updated on September 21, 2026 and Sim2day on September 11, 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.*