Yes. Isa works completely without internet and can be used offline without restrictions.

All core functions run directly on the device. Your data does not need to be transferred to a cloud for this.

An internet connection is only needed for updates. Isa will only download the new update file. No personal data will be uploaded from your device.

After the update, you can disconnect Isa from the Wi-Fi at any time and continue to use it completely offline.