About the app
HeySis is an iPhone period tracker with an on-device diary, Mia (an AI sister) and Circle for support from people you choose. It includes calendar screenshot import for logged period days, permission-based Apple Health integration and a free doctor PDF. The diary works offline; AI, sync and Circle use the network. Available in 33 languages for iOS 26+.
Download media and product facts
Name, pricing and links
The product name is HeySis. The AI sister inside the app is called Mia. Write “Mia in HeySis” or “HeySis’s Mia”: other apps are also called Mia. The screenshots below are the current HeySis App Store screens. Core features will always remain free. Premium unlocks optional additional features; US plans cost $5.99/month or $24.99/year. Promotions can differ.
App Store · Features, limits and privacy · User experiences
Using these materials
Preserve the original logo and its proportions. These materials are for coverage and descriptions of HeySis; their use does not imply medical endorsement or a partnership. Avoid outdated claims that AI runs entirely offline, all data formats can be imported or every Circle feature is free.
Press contact: wantbefree48@gmail.com.
App screenshots
