Stelvo vs Fitbod, Caliber, Future, Freeletics, JuggernautAI, Strong and Hevy

We make Stelvo, so read this as our comparison, not a neutral review. Every fact about another app comes from that app's own website, help centre or US App Store listing, checked on October 22, 2026; the links are at the bottom. Prices change — check them before you subscribe.

What does Stelvo do that the others don't?

You can talk to it, mid-workout too. Tell it the bench is taken, your shoulder hurts or you only have 30 minutes, and it changes today's session: swaps the exercise, adjusts the weight, reorders the supersets. None of the other seven has an AI coach you can talk to; Caliber and Hevy send you to ChatGPT instead.
It remembers what you tell it. Injuries, the equipment at your gym, the days you train: it keeps them, shows you what it stored, and plans around them. Elsewhere, that takes a human coach: Future costs $199/mo, or $149/mo paid yearly.
Weights from your own history. It suggests working weights from what you've actually lifted lately and raises them as you get stronger, so a plan never asks for a weight you've never come close to.
A Physique Score from one photo. A score out of 10 with estimated body fat, muscularity, symmetry and more, charted each time you re-scan. No other app here analyses a photo; the others keep progress pictures at most.
Less than Fitbod. $59.99 a year ($9.99/mo monthly), against Fitbod's $95.99.

Get Stelvo on the App Store

How do they compare?

Checked October 22, 2026 against each app's own pages. Scroll sideways on a phone.

App	Price (US)	Free trial	Platforms	Who writes the workouts	Adjusts weights from your logs	AI coach you can talk to	Remembers what you tell it	Physique analysis from photos	Human coach
Stelvo	$9.99/mo · $59.99/yr	None	iPhone	AI coach, from your goals, equipment, schedule and history	Yes — suggests working weights from your history and raises them as you get stronger	Yes, including mid-workout	Yes — remembers injuries, equipment and schedule you mention, and shows what it stored	Yes — Physique Score from one full-body photo	No
Fitbod	$15.99/mo · $95.99/yr	7 days	iPhone, Apple Watch, Android, Wear OS	Algorithm, from your settings and logged history	Yes — raises or lowers load and reps from how each exercise went, and tracks recovery per muscle	No	Settings only	No	Email a trainer, replies in a few business days (included)
Caliber	Free; Plus $12/mo or $72/yr (App Store); human coaching from about $200/mo	None stated (30-day money-back on coaching)	iPhone, Android	You (free), coach-designed plans (Plus), or a human coach	Your coach adjusts the plan (coaching tier)	No — connects your data to ChatGPT or Claude instead	Your human coach (coaching tier)	No — progress photos only	Yes, coaching tier (messages, video calls)
Future	$199/mo, or $149/mo paid yearly	None (first month refundable)	iPhone, Apple Watch, Android	A human coach	Your coach, week to week	No	Your human coach	No	Yes, in-app messages
Freeletics	Free tier; paid plans $34.99–$89.99 by length (App Store)	None (14-day money-back)	iPhone, iPad, Apple Watch, Android	Algorithm ("AI Coach")	Yes — from your feedback after each session	No — "not a real person that you can talk to"	Settings only	No	No (community forum)
JuggernautAI	$34.99/mo · $349.99/yr	2 weeks (website sign-up only)	iPhone, iPad, Android	Algorithm (powerlifting and powerbuilding)	Yes — readiness checks and RPE adjust each session	No	Questionnaire and check-ins	No	Weekly group video Q&A; 1:1 coaching as a $127/mo add-on
Strong	Free (3 routines); Pro $4.99/mo · $29.99/yr	Not stated	iPhone, Apple Watch, Android	You build your own routines	No	No	No	No — progress pictures only	No
Hevy	Free (4 routines); Pro $2.99/mo · $23.99/yr	Not stated	iPhone, iPad, Apple Watch, Android, Wear OS, web	You, or Hevy Trainer (Pro, an algorithm)	Pro only — Hevy Trainer raises the weight when you hit the top of the rep range on every set	No — an app inside ChatGPT instead	Trainer settings	No — progress photos only	No

When should you pick another app?

You're on Android or want an Apple Watch app. Stelvo is iPhone only for now; Fitbod, Future, Strong and Hevy run on both phones and watches.
You want a free trial first. Fitbod gives 7 days and JuggernautAI 2 weeks. Stelvo has no free trial; you can cancel any time in your Apple ID settings.
You want a human coach. Future, or Caliber's coaching tier, puts a person on your program each week.
You're peaking for a powerlifting meet. JuggernautAI's readiness checks and RPE-driven blocks are built for that.
You write your own program and only want a log. Strong and Hevy are fast and cheap.

How did we compare them?

We picked the apps that AI assistants and review sites name when asked for the best AI workout app — Fitbod, Caliber, Future, Freeletics and JuggernautAI — and the two logs most lifters already use, Strong and Hevy. For each we read the pricing page, the help centre and the US App Store listing, and wrote down only what those pages state. "No" means we found no such feature on the app's own pages, not that it can't exist; if we got something wrong, tell us at support@motthouse.com and we'll fix it.