Zenith vs Hevy — Log-Only vs AI-Generated Plan
Hevy is the cleanest workout logger you can find. Zenith builds and adapts your plan automatically. Here's which one is right for you.
iPhone · iOS 17 +
TL;DR Verdict
Choose Hevy if: You already know exactly what program you're running and just want to log it cleanly with good social sharing.
Choose Zenith if: You want the app to generate your program, adjust it week to week, and track nutrition alongside training.
The honest answer: These apps solve different problems. Hevy doesn't try to coach you — Zenith does.
Side by side
Hevy vs Zenith — 10 differences that matter
Manual log only — you bring the program
Generates a full program from your goals and equipment
Clean, fast logging UI with timer
Logging is part of a broader tracking system
Social feed — share workouts with friends
No social feed — focused on individual progress
Free tier with no paywall on core features
Free tier available; AI features require subscription
No nutrition tracking
Macro and calorie tracking built in
No adaptive planning
Plan adjusts based on what you logged and how you recovered
Strong community and exercise library
Smaller community but growing exercise library
Available on iOS and Android
iOS only
Great for powerlifting programs (5/3/1, GZCLP)
Better for users who want coaching, not just logging
Doesn't know when you missed a workout
Reschedules and adapts when you miss sessions
Honest assessment
Where Hevy actually wins
Hevy's logging UX is genuinely excellent. The timer is unobtrusive, the auto-fill from your last session surfaces your previous numbers exactly where you need them — right next to the current input field — and the progress graphs are polished and readable. After using several competing apps, Hevy has stripped the logging workflow down to what actually matters without cluttering it with features you didn't ask for.
The social sharing feature — where friends can see your workouts and react — has real value for people who are motivated by accountability. If you train with a partner or want your training community to follow along, Hevy's social feed provides something that most workout apps don't offer. There is a segment of lifters for whom visible external accountability is the single biggest driver of consistency, and for that group, Hevy's social layer is a meaningful differentiator.
For users running structured programs they found elsewhere — 5/3/1, Wendler, GZCLP, nSuns, a coach-prescribed program — Hevy is a near-perfect companion. It doesn't try to tell you what to do, which is a feature for some people, not a limitation. The assumption baked into Hevy's design is that you already know your programming and need a fast, clean way to track it. For experienced lifters who have spent years dialing in their approach, that assumption is entirely correct.
Hevy is also free for core features with no pressure to upgrade. The paywall-free experience on essential logging functionality is increasingly rare and worth acknowledging. If you train with a specific coach, follow a specific program, and have no interest in AI coaching or nutrition tracking, Hevy's logging-first approach is exactly right — and you won't pay for features you don't need.
Android availability extends the comparison in Hevy's favor for a significant portion of the market. Zenith is iOS-only. If you're not on an iPhone or iPad, the decision is made for you immediately.
Zenith advantages
Where Zenith wins
AI program generation
Hevy requires you to bring a program — Zenith builds one
Hevy is a logging tool. It has no mechanism to generate a training program for you. Open the app with no plan and it will wait. Zenith starts from your goals, available training days, and equipment, then generates a periodized plan. For anyone who hasn't built years of programming knowledge — or who simply wants the decision removed — this is the largest practical difference between the two apps.
Schedule adaptation
Hevy is static — Zenith rebuilds your week
When life disrupts your training schedule, Hevy records nothing. The week just has a gap. Zenith treats a missed session as a training signal and rebuilds the remaining days around it — redistributing volume across what's left in the week so the overall training stimulus is maintained. No manual decision required from you at any point.
Nutrition integration
Hevy is workout-only — Zenith does both
Hevy tracks nothing outside the gym session. Calories, macros, bodyweight trends — none of it exists in the app. Zenith connects your training data and your nutrition in one place, adjusts macro targets based on real weight trends, and accounts for training load when setting calorie goals. For any body composition objective, training data alone is only half the picture.
Missed-day handling
Hevy doesn't know when you skipped — Zenith does
In Hevy, a skipped session looks identical to a rest day. The app has no awareness of whether your absence was intentional or not, and it won't prompt you to make up missed work. Zenith flags missed sessions, audits your weekly volume state, and actively reschedules sessions to preserve the stimulus. For lifters whose weeks are frequently disrupted, this difference compounds over months.
Real scenario
3 months in, you miss Wednesday leg day
You've been training consistently for 3 months. Work runs long on Wednesday and you miss your scheduled leg day. Here is exactly what happens in each app.
Hevy
- 1
Nothing happens. The app doesn't know or care that you missed Wednesday. Your log simply has a gap for that day. There is no notification, no flag, no prompt.
- 2
Thursday is unchanged. Whatever you had planned for Thursday still shows as Thursday's session. Hevy doesn't shift anything forward or offer guidance on whether to run Wednesday's session first.
- 3
You manually decide: run leg day late on Thursday, skip it and move on, or try to compress the week. None of those options are presented. Hevy logs whatever you tell it to log — nothing more.
Result: Log has a gap. Weekly leg volume is lost. The decision of what to do next is entirely yours.
Zenith
- 1
The Wednesday session is flagged as missed. Zenith immediately audits your weekly volume state: quads, hamstrings, and glutes are behind their planned targets for the week.
- 2
Thursday's session is automatically adjusted — a lighter full-body session replaces what was a heavy lower day, preserving the training stimulus without overloading an already-compressed week. The changes are shown to you before you start.
- 3
By the end of the week, total volume for the trained muscle groups is maintained — not identical to the original plan, but equivalent in weekly sets. No decision required from you at any point.
Result: Weekly training stimulus maintained. Volume redistributed, not lost.
This scenario plays out every single week for the majority of people who train consistently. Work runs late, travel disrupts the schedule, a session simply doesn't happen. Hevy is honest about the fact that it doesn't handle this for you — that philosophy is intentional, and for experienced lifters who know their program cold, it's not a problem. For everyone else, the moment a session gets missed is exactly where structure breaks down and training becomes inconsistent. Zenith is designed around the assumption that most people need the decision handled for them, not handed back with no guidance. Whether that's what you want determines which app is right for you more than any other single factor.
Get Started
Want a program, not just a log?
Hevy logs any program you bring. Zenith builds one for you and adapts it when life gets in the way.
Download on App StoreSarah Okafor
Certified Fitness Instructor, 8 years coaching · Reviewed May 2026