Strong is a long-established workout tracker for iPhone, Apple Watch and Android focused on fast, structured logging of sets, reps and weight. Isofit is a workout tracker that takes workouts by tap, typed line or voice, shows the muscles your sets reached on a body graph, and includes Atlas, an AI coach that can read your log. Strong is released and established. Isofit is released too, and newer. Available on the App Store and on the web. The short version: pick Strong if you want a focused lifting log with no AI and no social feed; pick Isofit if you want plain-language logging and a coach built into the app.
Side by side
| Isofit | Strong | |
|---|---|---|
| Platforms | iPhone (iOS 17.6 or later) on the App Store, and a web app. Both are available now. No native iPad, Apple Watch or Android apps. | iPhone, Apple Watch and Android. |
| How you log | Three ways into one structured log: tap in sets, reps, weight, distance, duration and RPE; type a Quicklog line such as "bench 5x5 225lbs"; or speak the workout and review the parsed draft before saving. | Structured sets, reps and weight with templates, supersets and RPE. Free-text or voice logging is not advertised. |
| Exercise library | Nearly 500 exercises covering strength training, cardio, yoga, sports and martial arts, plus add unlimited custom exercises with your own muscle mapping. | Cardio and strength exercises with a growing set of animated videos, plus custom exercises. No library size is stated. |
| Muscle view | A front and back body graph shaded by working sets per muscle over 7, 30 or 90 days or all time, with sets by muscle and most and least worked. It is explicitly not a recovery score. Pro feature. | A muscle heat map is listed as a feature. What it measures is not stated. |
| AI and coaching | Atlas, an AI coach you talk to in chat. With your permission it reads your training history, and on Pro it writes programs and routines into your log. General fitness guidance, not medical advice. | None advertised. |
| Community | Bonfire, a members-only feed. A post needs a caption and an exercise category, is limited to one a day, and visible to all members. No follows, groups or direct messages. | Routines and workouts can be shared by link. No feed or follows are advertised. |
| Apple Health | Optionally reads workouts and daily summaries from Apple Health on every tier. Does not write to Apple Health. | Syncs workouts, bodyweight and body fat with Apple Health. |
| Activities covered | Logs strength training, cardio, yoga, sports and martial arts. | Strength focused, with cardio and duration exercise types. |
| Price | Free tier with logging, history and Apple Health import. Pro is $14.99 monthly or $124.99 yearly (USD). | Free version limited to 3 custom routines with unlimited workouts. PRO is listed at $4.99 monthly or $29.99 yearly (USD), and the App Store also lists a lifetime PRO Forever purchase. |
| Data export | On-demand JSON export of your training, Atlas, account, health and social records. | CSV export on iOS and Android. |
Where it fits
Where Isofit fits
Method
Facts about Strong come only from each company's own website, help center and store listings, read on October 17, 2026. Where a company does not state something, this page says "Not stated" and does not guess. Apps change and prices vary by region, so check each company's site for current details.
Isofit's column was reviewed on October 17, 2026. Isofit is available on the App Store and on the web, so you can try the two side by side.
Sources
Everything this page says about Strong comes from Strong Fitness PTE. LTD.'s own website, help center and store listings, read on . Apps change, and prices vary by region, so check Strong's site for current details. If something here is out of date, email support@isofit.app and we will correct it.
Questions
It depends on what you want from a log. Isofit fits if you want to log in plain language, see sets per muscle on a body graph, and ask an AI coach about your own history, all on iPhone. Strong fits better if you want a focused lifting log with no AI and no social feed.
Yes. Both are available today. Available on the App Store and on the web.
Facts on this page were last reviewed . Details can change as Isofit updates. Read this page as markdown.
Available on the App Store and on the web.
Your workouts, working for you.
Download Isofit from the App Store for iPhone, or use the web app in your browser.
