# Fast Female: building the platform as cofounders

> What MiraeStudio.id built with Fast Female: the app at app.fastfemale.io, its admin panel, and a Strapi-run marketing site, as cofounders alongside Jess.

- Author: [Nathanael](https://www.linkedin.com/in/naelnathanael71/), Co-founder & developer, MiraeStudio.id
- Published: 2026-10-04
- Updated: 2026-10-04
- Canonical: https://miraestudio.id/articles/fast-female
- Language: English ([Bahasa Indonesia](https://miraestudio.id/id/articles/fast-female.md))
- Publisher: [MiraeStudio.id](https://miraestudio.id)

[Fast Female](https://fastfemale.io) is cycle-synced fasting and training for women: a cohort programme and a companion app. Jess leads it. We are cofounders, and we built the product.

## The app

The platform at [app.fastfemale.io](https://app.fastfemale.io) starts with seven onboarding steps, then gives each member a home for the day: where she is in her cycle, today’s fasting window, and a place to log.

![The Fast Female home screen: cycle day, days to next period, and today's diet, movement and fasting cards](https://miraestudio.id/media/fast-female/home.webp)

*The member’s home. Screens are from a local copy with a test account.*

- Built on Next.js, with Postgres and Drizzle.
- Sign-in by email link, Google or Apple, through Auth.js.
- A push notification when a fast reaches its target.
- A JSON API kept apart from the screens, so a mobile app can use the same one later.

![The Fast Female fasting screen](https://miraestudio.id/media/fast-female/fasting.webp)

*Fasting: today’s fast for the current phase of the cycle.*

## The admin panel

Admins see users, invitations and platform settings. An invitation carries its own set of feature switches, so a new member arrives with exactly the features she was invited to.

![The Fast Female admin screen for sending an invitation with per-feature switches](https://miraestudio.id/media/fast-female/admin-invite.webp)

*Inviting a member, with a switch per feature.*

## Analytics

PostHog and Google Tag Manager, each on only when configured. The rule in the code is that free-text symptoms, log notes and chat content are never sent to either. Only categories and counts are.

## The site and its CMS

The marketing site at fastfemale.io runs on Strapi 5 and Next.js. Jess writes each page in Strapi as a list of sections, and the landing page styler renders whatever she provides. Publishing rebuilds the site into plain HTML, so visitors never wait on the CMS.

## Where it stands

Work on the app began in May 2026 and the site followed in July. On 9 June 2026 Fast Female was one of nine finalists, from six countries, pitching at ERIA’s HITS4WOMEN in Jakarta; [Jess wrote about it on LinkedIn](https://lnkd.in/p/grV56vuH). The project has been halted since August 2026.

## Ask Jess

If you want to know what working with us is like, ask the person who did. [Jess is on LinkedIn](https://www.linkedin.com/in/jessica-martua/).