Comparison

SecSign ID vs SCHMIDT® Sensor App

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SecSign ID

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
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SecSign ID – two factor authentication (2fa - 2 factor authentication) with the simplicity of mobile technology • Log into websites, applications, and systems without passwords and with the total security of out-of-band mobile authentication. • For the login you only enter your user name (SecSign ID) and confirm one access symbol (no entry of confidential credentials) • 2048-bit encrypted key pairs and public key infrastructure (PKI) provide identity access management (IAM) that is completely immune from login hacking, phishing, and malware. • No passwords or sensitive user information are ever stored on a login server. • Integrate SecSign ID 2FA into your own website, application, or systems with our free and unlimited cloud service. • Operate your own 2 factor on-premise server behind your firewall in your data center • Use SecSign ID 2FA for free access to the SecSign Portal, the truly secure solution for online collaboration with encrypted file sharing, file storage, and messaging. Features • Eliminates passwords and password theft • Quick and easy mobile authentication via 4-digit PIN, Touch ID fingerprint, Face ID, or even the Apple Watch! • No hardware or infrastructure required • Free, unlimited cloud service through our Secure Trust Center Servers • No need to use or remember passwords, retype SMS codes, or scan QR codes • High security and advanced cryptography on all levels • Also available as an on-premise installation for enterprise IAM Technical Details • 2048-bit asymmetric RSA key pairs or ECC key pairs • Public key stored and used on the ID server • Private key stored securely on iOS device • Brute force resistant private key storage • No private key information stored on the ID server • Sensitive credentials are never entered through user logins • Confidential credentials are never transmitted or stored on a server • High availability through redundant remote failover servers • Multi-tier secured server architecture • On-premise solutions available for installation on your own servers Apple Watch Support • Use your Apple Watch to log into websites with unbeatable identity security • No sensitive user credentials are ever transmitted or stored on a server • Verify your identity with a single tap on your Apple Watch How to Create Your SecSign ID for iPhone and iPad 1. Install the app 2. Choose a unique user name 3. Use biometrics or choose a short PIN to secure your SecSign ID on your mobile phone How to Start Using SecSign ID on your iPhone • Try the sample login on our website or log into our free and completely secure portal for encrypted file sharing and messaging, the SecSign Portal, at https://portal.secsign.com. • Developers can download our free plugins and integrate free, unlimited use of SecSign ID for your websites and applications. Visit https://www.secsign.com/plugins/ • Use it to protect your networks, websites, platforms, or devices • Use it with SecSign Portal for secure file storage, file sharing, and messaging • Deploy your own in-house SecSign ID server for enterprise security How to Log into Websites with Your Apple Watch • Use your existing SecSign ID or create a user name using the SecSign ID app on your iPhone • Make sure your Apple Watch is paired with your iPhone • Log into a website using your SecSign ID user name (e.g. Try the login on our completely secure portal for encrypted file sharing and messaging: https://portal.secsign.com) • A notification shows up on your Apple Watch. • On your Watch, tap the access symbol that matches the symbol on the website login screen • You’re now authenticated and access is granted SecSign ID is free for everyone and free of advertising. SecSign ID is a product of SecSign Technologies, a sister company of SecCommerce GmbH of Hamburg, Germany. We have over 24 years of experience in developing strong cryptography and highly sophisticated security software products for governments, public institutions, and private companies.

About

SCHMIDT® Sensor App

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App zur Nutzung in Kombination mit den SCHMIDT® Bluetooth® Modulen.

Screenshots

SecSign ID4 screens
SCHMIDT® Sensor App4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SecSign ID ships an update every 2 months, SCHMIDT® Sensor App every 3 weeks. The most recent releases landed on September 15, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 8 level
SecSign ID versus SCHMIDT® Sensor App: the parameters behind the verdict, then further details
ParameterSecSign IDSCHMIDT® Sensor App
PriceFreeFree
Rating3.5 (8 ratings) — better—
Positive reviews87.0% of reviews—
Number of ratings8 — better—
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size34 MB27 MB
Age rating4+4+
DeveloperSecSign Technologies Inc.Hahn-Schickard-Gesellschaft für angewandte Forschung e.V.

In-app purchases

None

SecSign ID

No in-app purchases

None

SCHMIDT® Sensor App

No in-app purchases

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 September 15, 2026 and SCHMIDT® Sensor App on September 24, 2026.

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