"Workout planning app" is a more specific search than "workout app," and it deserves a more specific answer. Planning means three things: building a program (exercises, sets, reps, progression), scheduling it (which days, what happens when you miss one), and adjusting it (what changes when you stall or blow past a target). Most apps do one. Here's how they split.
Scorecard
| App | Builds the program | Schedules it | Adjusts from your log | Price |
|---|---|---|---|---|
| GymAdapt | Yes, 6-week block from goal, days, equipment, experience; or build your own | Yes, calendar with your training days; anchors workout 1 to today | Yes, every target from last session's reps and RIR; soft step before deload; 6-week block with deload | $7.99/mo · $49.99/yr |
| Fitbod | One session at a time, algorithmic | Loose | Muscle-fatigue model | $15.99/mo · $95.99/yr |
| Hevy | You build; Hevy Trainer (Pro) scaffolds templates | Routines, no true calendar | No | $2.99/mo · $23.99/yr |
| Strong | You build | Routines | No | $4.99/mo · $29.99/yr |
| Jefit | Pre-built plans, large library | Yes, day-of-week routines | No | $12.99/mo · $69.99/yr |
| Ladder | Coach's 6-week block | Weekly schedule, fixed | No, you track loads | $29.99/mo · $179.99/yr |
What good planning looks like
A block, not a workout. Six weeks with a shape: a base week, three build weeks, a peak, a deload. GymAdapt and Ladder do this. Fitbod thinks one day at a time.
Days you'll keep. Pick three days and the plan should land on them, and if you miss Wednesday the block should be gated on sessions done, not calendar weeks passed. GymAdapt counts sessions; most apps count days.
Targets that come from you. Hit 10 reps at 2 in reserve, the next target goes up. Miss, and it holds or steps back before it deloads. And it should say why. GymAdapt writes the reason under every target ("Basis: 10/10/10 @ 135 at 2 RIR. Rule: rep ceiling hit.").
Room to override. Lock a weight for this set, this exercise, this workout or forever, and the plan should respect it without arguing.
If you'd rather build it yourself
Hevy
The most usable free tier in the category: unlimited workouts, four routines, three months of charts, no ads. The paid tier is the cheapest around and the lifetime price beats three years of anyone else's annual. Social feed if you like that, ignorable if you don't.
Skip it if you want the app to write your program. Hevy Trainer on Pro helps, but it's a template builder, not a coach.
Strong
A notebook, perfected. Two taps per set, no feed, no suggestions, the cleanest CSV export in the business. If your program lives in a spreadsheet or your coach's head, this is the fastest way to record it.
Skip it if you want demos, programming, or any kind of advice. Strong has opinions about nothing.
Both are excellent at holding a plan you wrote. Neither will change it for you. If you know what you're doing, that's a feature.
GymAdapt AI: Workout Coach
Tell it your goal, days per week, experience and what equipment you have, and it builds a 6-week block with real video demos for every exercise. Then it watches what you actually log. If you hit 10 reps at 2 reps in reserve, next session's target goes up and it tells you why. If you stall, it steps back before it deloads. Plate calculator, supersets, rest timer, Apple Health sync, and a coach chat that can trim a workout to the time you have.
Skip it if you're on Android, or you want a pure logger with no opinions.
Questions people ask
What is the best app to plan workouts?
For lifters who want the plan built and progressed for them, GymAdapt. For building and scheduling your own routines, Hevy or Strong. Fitbod plans one session at a time from a fatigue model.
Does GymAdapt let me build my own plan?
Yes. You can build a custom plan day by day from the exercise library, or start from the AI-built block and swap, add, remove or lock anything.
What is a training block?
A multi-week structure, usually 4 to 6 weeks, that builds intensity or volume then deloads. GymAdapt runs 6-week blocks: base, three build weeks, peak, deload.
Can I schedule workouts on a calendar in GymAdapt?
Yes. You pick your training days and the plan is scheduled on them, with the first workout anchored to today.
A six-week plan, on your days, that rewrites itself from your log.
GymAdapt is the planning app. Seven days free, no card.
Get GymAdapt on the App Store → $7.99 a month or $49.99 a year, with a 7-day free trial. iPhone only.