We started writing a simple math editor then we realized that writing math symbols was boring on Android. We also realized that writing a system keyboard for Android could make us happy because all the existing ones was not so useful so we did it. With a pretty system keyboard we realized that the remaining steps in order to have a fully functional Bluetooth keyboard was not so many. So here is Zeta Math

Zeta Math will allows you to write some math documents offline on your android phone you can use its keyboard as your default keyboard and switch it very quickly as you want with a simple shortcut (⌘+K).


if you are tired of typing Unicode symbols like Φ and ζ by filtering a big tables of Unicode symbols or making a lot of shortcut for them or if you simply want to test a simple way to do it try this app.

Zeta Math is packaged with its internal documentation whose we recommend you to read.

The Bluetooth keyboard does not require you to install anything on the host to control (may be your desktop) but the host MUST support BLE (Bluetooth Low Energy) and GATT profiles. It has not yet been tested with MacOs because here we love Linux and Windows is easier to find around us.

If you request any symbol to be added to the keyboard check if it exists in the following doc and send it to us https://github.com/stipub/stixfonts/blob/master/docs/STIXTwoMath-Regular.pdf.

You may have found a bug we are sure there is at least one. Don't worry don't get mad we will be happy to help you.

You can send us a private email at:
--- [email protected]

Or share with the community in the Google Group created for this app:
--- https://groups.google.com/g/zeta-math