Switching

Import from Hevy

Your Hevy history is yours, and it should arrive intact. LiftDiff reads Hevy's CSV export directly — no reformatting, no retyping.

Three steps

1. 1Export from Hevy. In Hevy, open Settings and choose Export & Import Data → Export Data. You get a CSV file with your entire history.
2. 2Open LiftDiff → Profile → Import / Export → Import history. Pick the CSV file, or paste its contents straight in. The columns are recognized automatically.
3. 3Review the match report. Exercise names are matched to LiftDiff's catalog; anything uncertain is listed for you to check before it lands. Duplicates are skipped, so importing twice is safe.

What survives the trip

• Every workout: date, duration, exercises, weights and reps
• RPE — converted to RIR on the way in (RPE 8 becomes RIR 2)
• Warm-up sets, kept as warm-ups
• Workout notes

And it works in the other direction too: your whole LiftDiff history exports as JSON or CSV any time, under a published schema. Switching in doesn't mean being locked in.