Onygma 4+

Offline encryption/decryption

Grindhero Ltd

    • $3.99



Use Onygma to encrypt/decrypt short messages on your and your peers offline device but transfer them using QR codes. Protect against any surveillance.

Onygma is the only method to protect your messages against spywares. Spywares can see your data even if your data is received through a secured channel, because messages are decoded when you view them. Onygma decodes your messages on an complementary, trusted offline phone of your choice.

Onygma is a PGP based message encryption/decryption app, that must be run on offline, trusted phones. Trusted phones between counterparts must be paired first. Encrypted messages can only be copied from the offline phones to the internet by taking a photo of the QR code containing the encrypted message.

QR codes are vessels, they are contain message that can only be decrypted by the counterparts trusted, offline phone.

Use Onygma to protect your messages. Send/Read Onygma encrypted messages only with an Onygma enabled, offline and trusted device

App Privacy

The developer, Grindhero Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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