
Flex: Travel Workout Log
Your plan, adapted to the road
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Free
In-App Purchases
About
The lifting log for travelers.
You travel often. Your training shouldn't start over every time you do. Flex keeps your program Flexible: write your week once, and it fits every gym on the trip.
CHECK-IN. Pick the gym you're in. Flex knows what each one has, from a full gym down to a hotel room.
START. If the gym is missing something, swaps are automatically suggested. Change any of them, or accept as given.
LIFT. Flex reminds you what you did last session. Tap the check mark and the rest timer starts.
ADAPT. Dumbbells too light? Pick a harder variation, rest-pause or drop sets. Your plan stays yours.
HEAD HOME. One log across every gym: calendar, records, and weekly sets per muscle.
SWITCHING APPS? Bring your routines with you. Import your workouts from Hevy, Strong or Fitbod as a .CSV. Flex also supports workouts entered as text, so you can paste a workout from any other app. You review everything before it's saved.
Included Features:
• Unlimited routines.
• Works offline.
• Dynamic Island rest timer.
• Muscle heatmap: see what you've worked this week.
• Apple Watch: log the next set from your wrist and feel the rest timer end.
• Write your program yourself, paste it from your notes, or draft one with any chatbot.
• Warm-up sets and plates per side, calculated automatically.
• Weekly sets per muscle against its growth range.
• Estimated 1RM with the math shown.
• Apple Health and iCloud backup.
• Shareable map with everywhere you've worked out this year.
No account. No subscription. No ads. Your data stays on your phone.
Flex is a training log that organizes the program you choose. It is not medical advice and does not design or supervise your training. Check with a doctor before starting an exercise program. You train at your own risk. Terms of Use and Health and Safety Notice: in the app under You, then Terms, Privacy and Health.
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What's New in Flex
1.3
October 17, 2026
Minor changes to the default exercise library, the default swap rankings, and the plate per side calculator (no longer shows up for lifts typically done with fixed weight barbells).
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Subscriptions & In-App Purchases
$2.99
Coffee
A small thank-you.








