iMobileSitter 4+

MobileSitter GmbH

Designed for iPhone

    • 4.0 • 2 Ratings
    • $5.99

iPhone Screenshots


iMobileSitter protects passwords, PINs and TAN lists using an innovative technique that offers higher security than conventional password managers. At the same time, iMobileSitter is as easy to use as conventional products. Hackers get nuts due to iMobileSitter's resistance against typical attacks (e.g., dictionary and brute-force attacks). Such attacks use trial and error to find the correct master password. Technologies like cloud computing allow to tremendously speed-up these attacks. Hackers do not even have expert knowledge to run the attacks. Many of these supposed secure password managers are actually easy prey for hackers, even if they use strong encryption algorithms such as AES, since important security assumptions for using these algorithms have been neglected by conventional products. iMobileSitter is different. Here, strong cryptographic algorithms are applied in such way that hackers do not get any usable feedback. Thus, when using iMobileSitter the stored passwords are secure.

Besides a higher security level, iMobileSitter provides additional features such as secure random password generation and a backup and restore function to provide additional reliability of the stored secrets in case of defect, loss, or theft. iMobileSitter combines higher security with convenience functions and easy to use interface.

iMobileSitter was developed by the Fraunhofer Institute for Secure Information Technology SIT in Germany.


iMobileSitter provides resistance against dictionary and brute force attacks. Nowadays, hackers usually test huge amounts of possible master passwords in order to get to the stored secrets. When using conventional password managers to encrypt data, a hacker can detect if the attempted attack was successful even without the necessity of testing the decryption result as a password at the respective service.

iMobileSitter is different. Here, an attacker cannot decide if the attempt was successful when looking at the decryption results. iMobileSitter accepts all master passwords. It decrypts the stored information on the basis of the given master password, irrespective of whether or not it is correct. However, the software misguides attackers by displaying wrong passwords.

Every decryption result looks as if it could be correct. For example, if a hacker decrypts a PIN assigned to a debit card using a master password, the decryption result that is returned will always be a four-digit number combination. From an attacker’s point of view - no matter whether hacker or hacking software - it is indistinguishable if the correct master password is found or not. For hacker or hacking software every decryption attempt seems to be successful.

To determine whether a decryption result is correct, the hacker has no choice but try to login with result at the respective service. There, however, additional security mechanisms of the service take effect after a defined amount of failed logins, e.g., three in the case of a debit card.

Further information can be found on


- Use of established cryptographic standards: AES, PBKDF2, ISO/IEC9797-1
- Group your secrets into folders
- Alphabetic and user defined sorting
- Search function
- Easy data backup (Email, iTunes)
- Encrypted backups
- Auto Log-Off
- Easy master password change
- Easy device replacement

If you like iMobileSitter, we would be happy if you write a review. Your feedback is always welcome. Please contact us to report any questions, comments or suggestions. Within the iMobileSitter app use "Options" > "Send email" for contact.

What’s New

Version 1.5.0

- iOS 13 support.
- Fixed: Problem with search function in iOS 13 solved.
- Security note: Before the update, please make a backup within the MobileSitter app and transfer the backup (.ims file) by mail or by file to another device.

Ratings and Reviews

4.0 out of 5
2 Ratings

2 Ratings

Mtn70 ,

Good idea but limited features

Hope that additional features, like taking notes, changing the order of the folders etc will be added in the next update.

App Privacy

The developer, MobileSitter GmbH, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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