The best offline workout tracker for basement gyms

The short answer

• Superset — logging, history, the progress dashboard and all 873 exercise guides with photos are bundled on the device. Voice logging is the one thing that needs a connection.
• Strong — logs offline reliably and syncs later. A long-standing strength here.
• FitNotes-style minimal loggers — local-first by design, no account required, nothing to fail.
• Hevy — logs offline and syncs afterwards, but the exercise library and social feed want a connection.
• Fitbod — generates workouts server-side, so a dead signal is a real problem.
• Anything with a web-first design — assume it stalls.

"Offline" hides four separate questions

Can you record a set? The baseline. Most decent trackers buffer locally and sync later, so this is usually fine.

Can you see your last session? Much less universal. If the app fetches history from a server, you lose exactly the number you needed — what you lifted last time — at exactly the wrong moment.

Can you look up an exercise? This is where most apps fail. Exercise libraries are big, with images or video, so they usually live on a CDN. No signal, no demonstration.

Does the app still tell you what to do? Anything that generates programming server-side stops being useful without a connection, however good it is online.

What survives without a connection

#1 Superset — the library ships inside the app

Superset stores everything you need on the phone. Local data is the source of truth every screen reads from, which is why the app is instant and why it does not care about your signal. That covers manual logging, your full history, the progress dashboard with its streaks and records, and the next-session targets the coach calculates.

The part most apps get wrong is the exercise library, and this is Superset's clearest offline advantage: all 873 exercises, with their step-by-step instructions and photos, are bundled into the download rather than fetched. Looking up how to set up a movement works in a concrete basement with no bars, which is precisely where you need it.

The honest limit, stated plainly. Voice logging does not work offline. The recording has to reach an AI model to be interpreted, so in a signal-dead gym you fall back to manual entry — which is free, unlimited, and fast. Routine import needs a connection for the same reason. The trade-off is that the download is around 88 MB, because the exercise photos are inside it.

#2 Strong — the dependable offline logger

Strong has logged offline and synced later for years, and it does it without drama. If your priority is a plain, reliable log that never stalls, it is a safe choice — and it has an Apple Watch app, which Superset does not.

Its free tier caps you at 3 custom routines, and PRO is $4.99 a month or $29.99 a year.

#3 Minimal local-first loggers

There is a whole category of small trackers that never had a server to depend on — no account, no sync, everything in a local database. They are bulletproof offline and have no caps, because there is nothing to gate.

The trade is that there is no backup either. A lost phone is a lost training history, which is a bad day if you have been logging for two years.

How to pick

• You need exercise demonstrations underground — Superset, because the library is bundled rather than streamed.
• You want voice logging — you will need signal for that specific action; everything else in Superset works without it.
• You want the longest offline track record — Strong.
• You want zero cloud involvement at all — a minimal local-first logger, and accept there is no backup.
• You rely on generated workouts — Fitbod is the wrong choice for a signal-dead gym.