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Circulus — Training Timer

Interval timer for groups
Matthias Eitner · Health & Fitness
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App info

Developer
Matthias Eitner
Category
Health & Fitness
Released
Sep 17, 2026
Version
1.2.0 (Oct 7, 2026)
Price
Free
Size
13.0 MB
Requires
iOS 26.0
Age rating
9+
Languages
English and German

In-app purchases

none
Current prices, App Store US.

About Circulus — Training Timer

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. WHY CIRCULUS EXISTS 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. It was made for us — and built so that it works for anyone who knows the same problem. FOR YOU • Create and edit routines • Add activities, rests, rounds and stations with parallel lanes • Run it in overview mode (shows every parallel lane at once) or in station mode (you pick one lane per station) • Write an introduction, add a Spotify or Apple Music link as a suggested soundtrack WITH YOUR PEOPLE • Send a routine as a link through any messenger — or as a file, and even the clips travel with it • Group mode: set a start time, the others scan the…
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