Switching from Strong
A Strong alternative with nothing to unlock
If you like Strong’s plain, fast logging but don’t want an account or a PRO upgrade, marble is a private workout journal for iPhone and iPad. Export your Strong history as a CSV, import it into marble, and check every workout before it’s saved. Every feature is free, and your training stays on your device.
marble and Strong, side by side
Strong is a long-running, no-frills workout log. marble is a private journal you can also type into. The Strong details below come from its App Store listing and help centre, checked on September 25, 2026.
| Topic | marble | Strong |
|---|---|---|
| Price | Free. Every feature, with nothing to unlock. | Free, with up to 3 custom routines. Strong PRO, a subscription or a one-time purchase, removes the limit and adds features. |
| Account | None. | Strong asks you to create a free account before you start. |
| Where workouts live | On your iPhone or iPad, with a JSON backup you control. | In your Strong account, synced by Strong Cloud. |
| App Store privacy label | Data Not Collected. | Lists data linked to you, including health and fitness data, your email address and identifiers. |
| Adding a workout | Type or paste it in your own words, import a file, or log set by set. | Log set by set, from a template or an empty workout. |
| Platforms | iPhone and iPad on iOS 26 or later. Apple Watch workouts come in through Apple Health. | iPhone, Android and Apple Watch. |
What you get with marble
- Write a workout the way you’d text it. Type
Squat 5x5 @ 225, or paste a whole week from Notes, and marble turns it into sets on your device. - Nothing saves until you’ve checked it. Review every exercise match, set, date, RPE and note first. A weak name match becomes a new exercise instead of merging into the wrong one.
- Set logging that keeps up. Log Again repeats your last set, Save + Next keeps the sheet open, and the record to beat shows while you type.
- Progress worked out on your phone. Top lifts with their record dates, estimated 1RM trends, weekly goals and a monthly report.
- Built into iOS. Widgets, Siri and Shortcuts, a rest timer in the Dynamic Island, and Apple Health.
- Private by design. No account, ads or marble server. The App Store privacy label reads Data Not Collected, and the source code is public.
What you give up
marble does less than Strong in a few places. Know them before you switch.
- No Android app. marble runs on iPhone and iPad.
- No cloud sync. Each device keeps its own journal, and a JSON backup moves it between them.
- No Apple Watch app. Watch workouts arrive through Apple Health, and you log sets on your phone.
- The import goes one way. marble’s backup is a JSON file for marble, not a Strong file.
Bring your Strong history
- Export your data from Strong as a CSV, and save the file to Files.
- Open Add in marble and tap Choose File, then pick the export.
- Review the workouts. The date, workout name, duration, set order, weight, reps, distance, seconds, notes and RPE come across. Squat (Barbell) and Squat (Dumbbell) stay separate exercises.
- Choose what to add, then save. Workouts already in your journal stay unselected, so a newer export can be imported later without duplicates.
Exports in kilograms, with semicolons and decimal commas, work too. The import guide has the details.
Strong details from its App Store listing and help centre, checked September 25, 2026. Plans and prices change, so check there for the current details. marble isn’t affiliated with Strong.
