# Circulus — Training Timer

> Interval timer for workouts: rounds, stations, groups. Completely free.

Canonical page: [https://chrome-stats.com/d/training.circulus.app](https://chrome-stats.com/d/training.circulus.app)

## Overview

- **ID:** `training.circulus.app`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Matthias Eitner
- **Category:** HEALTH\_AND\_FITNESS
- **Downloads:** 4
- **Version:** 1.3.1
- **Last updated:** 2026-11-09
- **First published:** 2026-10-07
- **Publisher country:** DE
- **Size:** 14 MB
- **Data as of:** 2026-11-12
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=training.circulus.app)
- **Website:** [https://circulus.training](https://circulus.training/)
- **Privacy policy:** [https://circulus.training/privacy](https://circulus.training/privacy)

## Description

Build your routine from activities, rests, rounds and stations. Run it on your own or together on the same countdown. No account, no sign-up.<br><br>WHY CIRCULUS EXISTS<br>My boxing group worked through a lot of timer apps. None of them won us over: either features were missing, or the basics sat behind a paywall. So I built the app we should have had.<br>It was made for us — and built so that it works for anyone who knows the same problem.<br><br>FOR YOU<br>• Create and edit routines<br>• Add activities, rests, rounds and stations with parallel lanes<br>• Run it in overview mode (shows every parallel lane at once) or in station mode (you pick one lane per station)<br>• Write an introduction, add a Spotify or Apple Music link as a suggested soundtrack<br><br>WITH YOUR PEOPLE<br>• Send a routine as a link through any messenger — or as a file, and even the clips travel with it<br>• Group mode: set a start time, the others scan the QR code, every device counts the same countdown<br>• No account, no sign-up, no email invitations<br><br>FOR YOUR COMMUNITY<br>• Record your own clips and use them in activities<br>• Keep a profile, pass your routines on<br>• Link a YouTube video in the introduction<br><br>YOUR DATA STAYS ON YOUR PHONE<br>Circulus has no server. Routines, profile and settings live on your device and nowhere else — there is nothing to sync, because there is nowhere to sync to. Group mode works without any connection between devices either: the QR code shares the start time, and every device handles the rest on its own.<br>Routines leave your phone only when you deliberately share them.<br><br>FREE. COMPLETE.<br>Every feature is included. There is no pro version, no subscription, no locked switches — that was the reason to build this app in the first place.<br>Ads carry the running costs. They appear in the library and after a workout — never during a workout, never while sharing.<br><br>THE CLIPS THAT COME WITH IT<br>The five exercise clips Circulus ships with were generated with AI. They are there so the app is not empty on day one — the clips that matter, you record yourself.<br>The spoken cues are generated with AI as well.<br><br>QUESTIONS, IDEAS, BUGS<br>Write to me: support@circulus.training — or on X at @just_mazen.

## Rankings

- #3,077,321 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.CAMERA`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.gms.permission.AD_ID`
- `training.circulus.app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Similar extensions and apps

- [Rounds: Interval HIIT Timer](https://chrome-stats.com/d/com.dangerfield.hiittimer.HIITTimer) — 109 users
- [Round Timer](https://chrome-stats.com/d/com.intervaltrainer.hiit)
- [Routine Timer - Interval Timer](https://chrome-stats.com/d/com.benheo.routinetimer) — 36 users
- [RoundBellTimer](https://chrome-stats.com/d/com.roundbelltimer.app)
- [Interval Timer](https://chrome-stats.com/d/com.skarletforge.intervaltimer) — 23 users
- [HIIT Timer: Work Rest Rounds](https://chrome-stats.com/d/com.brothapps.hiit) — 527 users
- [Kairo Timer](https://chrome-stats.com/d/app.kairo.timer) — 22 users
- [Pulse - Interval Timer](https://chrome-stats.com/d/com.pulsetimer.app) — 161 users
- [Simple Interval Timer](https://chrome-stats.com/d/com.celestwatches.intervaltimer) — 553 users
- [PunchTime: Boxing Timer](https://chrome-stats.com/d/com.mightysebas.punchtime) — 22 users
- [Tabata Timer: Train & Rest](https://chrome-stats.com/d/com.lifeeapp.tabatatimer) — 134 users
- [AS Timer - Circuit Training](https://chrome-stats.com/d/hu.appsolution.astimer) — 54 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/training.circulus.app)