# Introduction

> What Sparta Fitness is, who it's for and the ideas behind it.

Sparta Fitness is a group fitness tracking app for people who train better with friends. You log your workouts and daily activity, your group sees it on a monthly leaderboard and you build a streak one active day at a time.

It runs natively on iPhone and **Android**, with [watch companions](https://spartafitness.app/docs/watch.md) for **Apple Watch and Wear OS**. Everything stays in sync across all your devices.

## What you can do

- **Log workouts** with custom templates, sets, reps and weights. Or log a run, a sport or a quick check-in for any active day.
- **Join groups** with friends or teammates and see everyone's progress in one place.
- **Compete on monthly leaderboards** ranked by active days.
- **Track streaks** across every active day you log.
- **Cheer your group** in the [social feed](https://spartafitness.app/docs/social.md) with AUUH reactions and comments, with full control over what it shares about you.
- **Pull in workouts** from Strava, Garmin, Fitbit, Samsung Health and anything that writes to Apple Health or Health Connect. See the [integrations guide](https://spartafitness.app/docs/account/integrations.md) for setup.

*Screenshot: Home: your streak and active days, today's workout and what your crews have been up to.*

## The core idea: active days

Most fitness apps are built around individual workouts. Sparta is built around active days. Every workout, run, sport or check-in counts as one active day. Duration and intensity don't matter.

That sounds simple and it is. The point is to reward showing up, not optimizing volume. A 20-minute run counts the same as a two-hour lift. The friend who works out every day wins, not the one who pushed hardest on Saturday.

This shapes everything else in the app:

- **Leaderboards reset monthly** so anyone can catch up.
- **Streaks count calendar days**, not workouts.
- **Groups stay motivated** because the metric is consistency, not strength.

## Who it's for

Sparta is designed for:

- **Friend groups** who want a shared, low-friction way to keep each other accountable.
- **Teams and clubs** running monthly fitness challenges.
- **Individuals** who train better with a streak to protect.

It's not a coaching app, a nutrition tracker or a wearable replacement. It pairs well with whatever you already use. Bring your workouts in through Apple Health or Health Connect and Sparta handles the social layer.

## How groups work

You can create a group, invite friends with a code and start a month together. Everyone's active days roll up into a single ranked board and the [social feed](https://spartafitness.app/docs/social.md) shows what everyone has been doing so you can cheer it on. At the start of the next month, the board resets and a new race begins.

Groups are private by default. Nobody outside your group sees your activity.

*Screenshot: A monthly leaderboard ranked by active days, with streak badges beside each name.*

## Privacy and your data

Sparta only collects what's needed to run the app: your name, email (via Apple or Google sign-in) and the workouts and activities you log. We don't sell data, don't show ads and don't ask for medical information.

For the full breakdown, see the [privacy policy](https://spartafitness.app/privacy).

## Next steps

Ready to start? Head to [Getting Started](https://spartafitness.app/docs/getting-started.md) to install the app, sign in and log your first active day.

Web version: https://spartafitness.app/docs/introduction