# SecSign ID vs SCHMIDT® Sensor App

The clearest difference is update cadence: SCHMIDT® Sensor App at every 3 weeks against SecSign ID's every 2 months. SecSign ID's advantage is iOS requirement (15.0 vs 26.0). 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.

SecSign ID ships an update every 2 months, SCHMIDT® Sensor App every 3 weeks. The most recent releases landed on October 3, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | SecSign ID | SCHMIDT® Sensor App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (8 ratings)](https://appshunter.io/ios/app/secsign-id/id581467871/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 87.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 34 MB | 27 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SecSign Technologies Inc.](https://appshunter.io/developer/581467874) | [Hahn-Schickard-Gesellschaft für angewandte Forschung e.V.](https://appshunter.io/developer/1686895358) |

## What reviewers say

### SecSign ID

[App page](https://appshunter.io/ios/app/secsign-id/id581467871)

Enhance your online security with advanced two-factor authentication. Log into websites and applications without passwords, using secure mobile verification. Protect your accounts from phishing and malware with encrypted key pairs and a robust public key infrastructure.

**Highlights:** Passwordless login, Out-of-band mobile authentication, 2048-bit encrypted key pairs, Public key infrastructure (PKI), Free cloud service, On-premise server option, Apple Watch support

**Features:** macOS Compatibility

**In-app purchases:** none


### SCHMIDT® Sensor App

[App page](https://appshunter.io/ios/app/schmidt-sensor-app/id6751941102)

**In-app purchases:** none


## Frequently asked questions

### Is SecSign ID free?

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

### Is SCHMIDT® Sensor App free?

SCHMIDT® Sensor App is free to download, with no in-app purchases.

### Do SecSign ID or SCHMIDT® Sensor App have ads?

Neither SecSign ID nor SCHMIDT® Sensor App shows ads.

### Which is updated more often, SecSign ID or SCHMIDT® Sensor App?

SecSign ID ships an update every 2 months, and SCHMIDT® Sensor App every 3 weeks. Most recently, SecSign ID was updated on October 3, 2026 and SCHMIDT® Sensor App on September 24, 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.*