App comparison · Updated June 2026
Zenith vs Hevy: the best logbook in the gym, or the coach who carries one?
This is the rare comparison where both apps can be the right answer — for two different people. The whole question is whether you bring your own program to the gym, or want one built and maintained for you.
Disclosure first, as always: we make Zenith, this is the Zenith website, and you should read us the way you'd read Hevy writing about us. With that said, we're going to open with something app comparison pages almost never say: Hevy is excellent. It might be the best pure workout logger ever shipped, its free tier is honest, and its paid tier costs less than a protein tub. If a logbook is what you need, you can stop reading and go get it.
The comparison only becomes interesting because a logbook assumes something: that you already know what to write in it. Hevy's design premise is a lifter who has a program — from a coach, a subreddit, a spreadsheet — and needs a beautiful, fast place to execute it. Zenith's premise is the opposite: most people don't have a program, don't know how to periodise one, and quit not because logging was slow but because nobody adjusted the plan when life happened.
You're a Hevy person if…
- · You run 5/3/1, GZCLP, a coach's program, or your own split
- · You want sub-60-second logging and a watch app
- · Your friends are on it and the social feed keeps you showing up
- · You want to pay ~$24/year — or nothing at all
You're a Zenith person if…
- · You want the program written for you — and rewritten when you miss days
- · You want nutrition targets and meal logging in the same system
- · You want an AI coach that knows your plan, not a generic chatbot
- · You care about physique change, not just the numbers on the bar
Where Hevy wins, in detail
In-gym logging speed.Hevy is the benchmark. Previous weights pre-fill, rest timers fire automatically, supersets and drop sets are first-class, the Apple Watch app can run a whole session without touching your phone, and the interface never adds a decision between you and the next set. Zenith's in-workout logging is fast and works offline, but we're not going to claim we beat a product whose entire engineering culture is optimizing one screen.
Price.Hevy's free tier (full logging, 4 routines, 7 custom exercises, 3 months of charts) is enough for many lifters indefinitely. Pro is $2.99/month, $23.99/year, or $74.99 once, forever. That is close to the cheapest paid tier in the entire fitness category, and any comparison that doesn't concede this category is being silly with you.
Social.Hevy has a real community: a feed of friends' workouts, likes and comments, and the gentle accountability of people noticing you trained. Zenith has streaks and shareable physique cards but no social graph. If training with an audience keeps you consistent, that's a legitimate, durable reason to choose Hevy.
Platforms. iOS, Android, a full web app, and the watch experience. Zenith is iPhone-only today. Three categories, three clean Hevy wins — four counting price.
Where Zenith wins, in detail
The program itself.Hevy's answer to “what should I do on Monday?” is a blank routine builder. Zenith's answer is a periodised week generated from your experience level, schedule, session length, and equipment — full body for beginners, upper/lower for intermediates, PPL for advanced — with progressive overloadprogrammed in from day one. Hevy's newer Pro “Trainer” feature adds adaptive programs and weight suggestions, and it's a sensible addition, but it is a bolt-on to a logger. In Zenith, generation and adaptation are the architecture, not the upsell.
Adaptation.Skip Tuesday in Hevy and Tuesday's routine just sits there, unjudging, until you run it. Skip Tuesday in Zenith and the check-in redistributes the remaining week against your goal date, then shows you what changed. Rate each session Too Easy / Just Right / Too Hard and load drifts accordingly over the following weeks. A static routine and an adapting plan look identical in week one; by week eight of a real, interrupted life, they are different products — we walk through the failure mode in workout apps that adapt when you miss a day.
Nutrition.Hevy doesn't do food, by design. Zenith computes TDEE-based calorie and macro targets, generates a 7-day meal plan, and logs meals from photos with confidence labels — in the same engine as training, so a light week or an under-eaten stretch can move your targets. Lifters pairing Hevy with a macro app are paying twice and reconciling by hand; the longer argument lives in combining workout and nutrition tracking.
Outcome tracking beyond the bar. Hevy's charts for volume and one-rep-max trends are genuinely good. But the question most people are actually training to answer — “is my body changing?” — needs more than bar math. Zenith tracks trend-smoothed weight, strength curves, adherence streaks, and the AI physique scan: a five-metric visual score over time. The scale and the bar can both flatline while the mirror improves; only one of these apps can show you that.
The scope difference, on screen
A logger's home screen shows your routines. Zenith's shows your day.
Today's workout
Push Day A
Today's nutrition
Log1,560
Calories left · of 3,440
62g
Protein left
188g
Carbs left
41g
Fat left
Progress
12-day streakGoal
EditCurrent weight
181.4 lbs
Your goal
174 lbs
−6.2 lbs since May 1
1W · 1M · 3M · ALL
Add past weights or import from Health
This week
2 of 3
Log your weight
Done · 181.4 lbs this morning
Complete 4 workouts
3 of 4 — Push Day A is today
Hit protein 5 days
4 of 5 days so far
Feature by feature
| Capability | Zenith | Hevy |
|---|---|---|
| AI-generated weekly program | ✓ core feature | Trainer add-on (Pro) |
| Plan redistribution after missed days | ✓ via check-in | — |
| Set-by-set logging, PRs, strength charts | ✓ | ✓ best-in-class |
| Apple Watch logging | — | ✓ |
| Social feed & friends | — | ✓ |
| Nutrition targets & meal plan | ✓ | — |
| AI photo meal logging | ✓ | — |
| AI physique scan | ✓ five metrics | — |
| Readable, voice-editable AI Context | ✓ | — |
| Platforms | iPhone (iOS 17+) | iOS, Android, web |
| Free tier | Free download; AI features paid | Generous: 4 routines, 3-mo history |
| Paid price | Shown on in-app paywall | $2.99/mo · $23.99/yr · $74.99 lifetime |
The verdict
We're not going to manufacture a knockout that isn't there. Hevy wins logging speed, price, social, and platform reach — four real categories. Zenith wins programming, adaptation, nutrition, coaching transparency, and outcome tracking — five categories that happen to be the ones that determine whether training works.
Our call: match the app to your self-sufficiency
If you can write your own program and your problem is execution, buy Hevy Pro and don't look back — $23.99/year for that quality is a gift. If your problem is the program itself — what to do, how to adjust it, what to eat around it — a logbook can't solve that, and Zenith was built precisely there.
Related reading: Zenith vs Strong covers the other beloved minimalist logger, Zenith vs Fitbod covers the other AI generator, and the best apps for tracking lifts and PRs ranks the whole field.
Frequently asked questions
Is Hevy really free?
The free tier is genuinely usable — full logging, up to 4 routines, 7 custom exercises, and 3 months of graph history. Hevy Pro removes those caps for $2.99/month, $23.99/year, or a $74.99 lifetime purchase. It's one of the most generous pricing models in fitness apps, and we say so plainly in this comparison.
Does Hevy create workout plans for you?
Historically no — Hevy is built around routines you create or copy, and that self-direction is the whole design. Hevy has been rolling out a Pro 'Trainer' feature with adaptive programs and weight suggestions, but program generation is an add-on to a logger, not the core of the product. In Zenith, the generated, adapting plan is the product.
Can Zenith replace Hevy for logging sets?
Yes — every workout in Zenith is logged set by set with rest tracking, PR detection, and per-exercise strength trends, and logging works offline. If your favourite part of Hevy is the social feed or watch-first logging, those are points for Hevy covered honestly below.
Which app is better for a beginner?
A complete beginner using Hevy still has to answer 'what program should I run?' somewhere else. Zenith answers it in onboarding — a periodised week matched to your level, equipment, and schedule, with the reasoning available from the AI coach. If you don't yet know how to program training, that's the difference that matters most.
Does Hevy track nutrition?
No. Hevy is deliberately a training logger — no calories, no macros, no meal logging. Zenith includes TDEE-based targets, an AI-generated 7-day meal plan, and photo meal logging in the same app as the training plan.
Bring a program, get a logbook. Bring a goal, get a coach.
Zenith writes the week, adjusts it when you miss, and feeds it with your nutrition. Free to try on iPhone.
Download Zenith Free