Ombrix
Still exactly the original?
The wording of a signed agreement. A promise made to someone who matters. A draft before it goes public. The more time passes, the harder it becomes to prove it's still exactly as it was.
Ombrix seals your text (your Original) with SHA-256 the moment you save it, so you can mathematically verify — a year from now, ten years from now — that not a single thing has changed. Once saved, an Original can never be rewritten by anyone, not even by us, the developers. There's no edit feature at all.
Nothing goes to the cloud. No account required. No ads. Your Original continues to exist only on your own device.
Transfer safely to another device using nothing but a QR code — no internet connection required at all.
Available in Japanese, English, German, French, Spanish, and Traditional Chinese.