About ArchiFit

ArchiFit (아키핏) is a free workout log app made by OHSEO's (오서네), a one-person software studio in Seoul, South Korea. The developer trains alone, without a coach, and built ArchiFit to answer the question every set raises: what goes on the bar next. The answer comes from your own log.

Last updated By ArchiFit

Why it exists

Training alone means deciding every weight yourself. A paper log or a notes app keeps the numbers but leaves the decision to you, and a fixed program does not know how your last session went. ArchiFit keeps the log and applies a small set of fixed rules to it, so the next set is always one line away. The rules are published in full on How ArchiFit works.

The AI is a second layer that you can switch off. The 8-week analysis on the weekly report runs only if you agree. Logging, the rest timer, records, plans and reports all work without it.

What ArchiFit holds to

About this site

Other services on archi-ai.app are not ArchiFit. This site, fit.archi-ai.app, is the official site of ArchiFit by OHSEO's. The guides here are written by ArchiFit and cite the research they rely on, with links.

Get ArchiFit on the App StoreComing soon on Google Play