Fantinnovation

An independent software company based in Japan.

Fantinnovation builds small, focused software products and publishes them under its own name. No outside investors, no ad-funded growth targets to chase — just software built to do one thing well and charge a fair, simple price for it.

How we build

Every product we publish follows the same rules: do the smallest useful thing well, collect no more data than the product needs to function, price plainly, and keep operating costs low enough that a product doesn't need to grow fast to be worth maintaining. That's a deliberate choice, not a limitation we're working around — it's what lets a very small team keep a product running indefinitely.

What we've published

Plainlog — an offline log for GLP-1 doses and weight, for iOS and Android. No account, no cloud, no ads; everything stays on your device. See Products for more, or visit the product's own site.


Fantinnovation is a Japanese 合同会社 (GK). See the Company page for what that means.