Hevy Alternative for Fitness: Logger vs Habit Twin
Hevy tracks your sets. We build your twin.
Most people searching for a Hevy alternative want one of two things: a cheaper Hevy, or a different job entirely. This post is the second. Hevy tracks your sets (and often the gym social graph). ftns.ai builds a private twin from the week.
That makes this an easy comparison to write and an awkward one to sell, so we will do the honest version. We are complementary — not a like-for-like replacement for Hevy’s logging depth or Hevy Trainer.
Is ftns.ai a Hevy alternative?
Only if what you want is a reason to keep the week — not a deeper set notebook.
Hevy exists to answer: what did I lift, in which routine, over which history? It is a workout logger with routines, custom exercises, history, Watch and web companions, and a first-class social layer. On Pro it adds Hevy Trainer — adaptive programming Hevy describes as an algorithm, not AI.
ftns.ai takes what you actually did across the day and turns it into a full-colour 3D character built to your proportions — your twin — plus a private Life Score and Future Self. Shallower on any single set log. Wider on the week.
Plenty of people can use Hevy for the session notebook and ftns.ai for the reason to keep showing up. That is the honest Hevy alternative framing.
Logger vs habit twin
Hevy goes deep on the session. ftns.ai goes wide on the day.
Hevy’s core job is logging: sets, routines, history, and (on Pro) Trainer-style programming with overload suggestions. If you want progressive programming managed for you inside the logger, that is Hevy Trainer territory — and it is not what we claim to match.
ftns.ai’s core job is the habit twin: Life Score across the week, a twin that reflects how you played, and Future Self as habit-driven timelines. The coach inside ftns.ai can plan a session from your goal and equipment. It does not do load science — no one-rep-max estimates, no plate maths, no fatigue model. That line is the same one we drew against generators in ftns.ai vs Fitbod. Hevy is a logger (and social gym), not a Fitbod clone — but the load-science gap still points away from us.
Social gym vs private week
Hevy’s social layer is first-class: follow, copy routines, likes and comments. A profile can be private, but the product is still built around an audience. That is a real strength if you want a social gym.
ftns.ai has no audience layer — nobody to be compared against, nothing to post into, no friends list, no ranked lists. Sharing means you export a score card yourself when you feel like it. Why we built it that way is in why there is no social side.
If social fatigue is why you are shopping a Hevy alternative, private week-tracking is the different job — not a quieter Hevy.
What does Hevy cost in 2026?
As of 11 September 2026, Hevy’s free tier still lets you log workouts without a paywall, with caps cited in Hevy’s help center: 4 routines, 7 custom exercises, and 3 months of history. Unlimited workout logging sits on free; the caps hit when you outgrow routines, customs, or older history.
Hevy Pro on the US App Store shows $2.99/month, a $3.99/month SKU, $23.99/year, and $74.99 lifetime (storefronts change — check your own checkout). Pro unlocks unlimited routines/customs/history, warm-up tools, advanced stats, and Hevy Trainer.
ftns.ai is free to play. Twin, Life Score, tracking, the coach inside ftns.ai, and Future Self stay free. Premium is $4.99/month and buys cosmetics only. Nothing you buy moves Life Score.
The subscriptions buy different jobs. Hevy Pro buys logger depth and Trainer. ftns.ai Premium buys looks. Neither is “the same product cheaper.”
Side by side
| Hevy | ftns.ai | |
|---|---|---|
| What it is | A workout logger with a social gym layer | A fitness habit game with a digital twin |
| Core job | Log sets, routines, and history | Turn the week into a private twin and Life Score |
| Logging depth | Deep — sets, routines, history, Watch/web | Shallower on any single set log |
| Programming | Hevy Trainer on Pro (algorithm, not AI, per Hevy) | Coach plans sessions; no load science |
| Scope | The training session | Whole day — training, recovery, sleep, mood, consistency, and more |
| Core number | Logged volume and stats | Life Score with category bars |
| Character / twin | — | Full-colour 3D twin built to your proportions |
| Forward projection | — | Future Self: habit timelines, free |
| Social | First-class social layer; profile can be private | No audience layer — private by design |
| Free tier | Unlimited logging; caps on routines (4), customs (7), history (3 mo) | Everything functional free, permanently |
| Paid tier | Pro — US App Store ~$2.99–$3.99/mo, $23.99/yr, $74.99 lifetime | Premium — $4.99/mo, cosmetics only |
| Platform | iOS, Android, Apple Watch, Wear OS, web | iPhone |
Hevy free caps per Hevy Pro help article; Pro prices per US App Store IAPs checked 10 September 2026 for an 11 September 2026 disclosure stamp. Hevy runs multiple SKUs and varies by region — check your storefront before subscribing. Trainer wording (“algorithm, not AI”) per Hevy Trainer Explained.
What ftns.ai is not
Stated plainly, because “Hevy alternative” invites the wrong assumption:
- Not a Hevy-depth set logger. We do not match routines, custom-exercise depth, multi-year history tools, or Watch/web logging.
- Not Hevy Trainer. The coach inside ftns.ai plans sessions. It does not run Hevy’s adaptive overload algorithm or load science.
- Not a medical product. ftns.ai is a game in Health & Fitness. It does not assess your body or replace a trained professional.
- Not social. No audience layer. If you want the social gym, Hevy is built for that.
So which one
- Use Hevy if you want deep set logging, Watch or web, a social gym, or Pro Trainer programming.
- Use ftns.ai if you want a private week, a twin, whole-day Life Score, and functional tracking that stays free.
- Use both if you log the session in Hevy and keep the week — rest, sleep, mood, consistency — on ftns.ai. They do not overlap enough to conflict.
If you are mapping the wider category rather than just these two, the care-loop apps map covers the rest. Ready to try the private side? ftns.ai.
Frequently asked questions
Is there a free Hevy alternative?
ftns.ai is free to play, but it is not a like-for-like Hevy replacement. Hevy’s free tier already includes unlimited workout logging with caps on routines, custom exercises, and history. ftns.ai is free because the twin, Life Score, and tracking stay unlocked — a different job, not a free clone of Hevy’s notebook.
Is ftns.ai like Hevy?
Only in the loose sense that both care about training consistency. Hevy is a workout logger with a social layer. ftns.ai is a private habit game with a twin. We do not match Hevy’s set-logging depth or Hevy Trainer.
Hevy vs Strong / Hevy vs Fitbod — where does ftns.ai fit?
Hevy vs Strong is logger vs logger. Hevy vs Fitbod is logger vs generator. ftns.ai sits beside that map as a private habit twin — closer to “why keep the week” than “what do I lift today.” For generator vs habit, see our Fitbod comparison.
What does Hevy Pro cost in 2026?
On the US App Store as of early September 2026: about $2.99/month, a $3.99/month SKU, $23.99/year, and $74.99 lifetime. Prices vary by storefront and region — check the App Store at purchase. Pro unlocks unlimited routines/customs/history and Hevy Trainer.
Does ftns.ai have a social layer or social features?
No. ftns.ai has no audience layer — no friends list, no ranked lists, nothing to post into. Your week stays private. Hevy’s social layer is first-class if that is what you want.
Can I use Hevy and ftns.ai together?
Yes. Log sets and routines in Hevy; keep the wider week on ftns.ai. Neither replaces the other. Optional note: HevyGPT is a ChatGPT import path for routines — separate from Trainer, and free accounts still hit the 4-routine cap.