Simple Muscle

AI-native workout tracking

Category: Health & Wellness
Primary Subcategory: Strength & Gym Workout Trackers

Integration details

Description

AI-native workout tracking with Simple Muscle lets ChatGPT read workout plans, explain exercises, create or edit routines, and summarize training history for a signed-in user.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: Health & Wellness
Primary Subcategory: Strength & Gym Workout Trackers
Secondary Subcategories: None listed
Brand: Simple Muscle
Access: Account required
First tracked: 2026-09-23
Tool count: 19
Geography: US

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Primary Subcategory

Competing in ChatGPT Strength & Gym Workout Trackers

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Listed in alphabetical order

Primary Subcategory

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Tools

19 tools agents can invoke

Add a catalog exercise to an existing workout.
add_exercise_to_workout
Use this only when the user asks to create one workout, not a multi-day plan. Creates one workout from catalog exercise ids with sensible defaults. Use create_workout_plan instead for two or more workouts because it accepts exact prescriptions and renders the finished plan in one call.
create_workout
Use this when the user asks to create a complete multi-day or multi-workout plan. Create every workout with exact exercise prescriptions in one call. This tool saves the entire plan and renders the final SimpleMuscle workout overview itself; do not follow it with create_workout, update_exercise_sets, or show_workout_overview.
create_workout_plan
Permanently delete a workout (its completed history is kept). Prefer archiving via update_workout unless the user explicitly wants it gone.
delete_workout
Fetch the full contents of a search result by id.
fetch
One completed workout session with every logged set.
get_session
Use this when you need raw exercise details for reasoning. For a user-facing explanation or how-to answer, prefer show_exercise_info after resolving the exercise id.
get_exercise
Use this when you need raw logged sets for one exercise across past sessions, newest first — for progress analysis and picking the next target weights. For a visual progress summary, also use show_training_stats with the exercise_id.
get_exercise_history
One workout in full detail, including per-set targets and plan_ids for editing.
get_workout
Completed workout sessions, newest first. Filter by date range or source workout.
list_history
Use this when you need raw workout template data for reasoning or editing. For a user-facing overview like 'what workouts do I have?', prefer show_workout_overview so the client can render the SimpleMuscle UI.
list_workouts
Remove an exercise entry from a workout. This discards the entry and its custom targets and notes.
remove_exercise_from_workout
Search the user's workouts, completed sessions and the exercise catalog. Returns result ids for use with fetch.
search
Search the exercise catalog. Returns exercise ids, muscles, equipment and default prescriptions. Use the filters to narrow down ~200 exercises.
list_exercises
Use this directly when the user asks about an exercise, asks how to do it, or wants form/instruction details. Pass exercise_id if known, otherwise pass exercise_query with the natural exercise name. Renders a compact SimpleMuscle widget with the exercise image and step-by-step instructions. Benefits and common mistakes remain available for the accompanying text response.
show_exercise_info
Use this directly when the user asks to see training stats, progress, workout frequency, volume, or what weights they lifted. Pass exercise_id if known, otherwise pass exercise_query when the user asks about one exercise by name. Renders a SimpleMuscle stats widget.
show_training_stats
Use this when the user asks what workouts they have, asks to see workouts, or wants a user-facing workout overview. After workout creates or edits, wait for every write tool to finish and call this as the final separate tool; never call it in parallel with workout writes. Renders a compact SimpleMuscle widget with exercise images, targets and schedule labels.
show_workout_overview
Adapt the prescription of one exercise in a workout: set count, uniform targets (reps/weight/duration applied to every set), notes, or position. Only the provided fields change. For strength exercises, send reps and optionally weight_kg; omit duration_seconds. For cardio or stretching, send duration_seconds; omit reps and weight_kg. After this and all other workout writes finish, call show_workout_overview as the final separate tool; never call it in parallel with writes.
update_exercise_sets
Rename a workout, change its scheduled day, or archive/unarchive it.
update_workout

Simple Muscle FAQ

How do I improve a ChatGPT Plugin's discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are Simple Muscle alternatives on ChatGPT?

As of 2026-09-29, Simple Muscle competes with Caliber, CoachPilot, Do Workout, FitAI Pro, Fitbod, Grow Room HVAC Calculator, GymLog, Hevy, Hyperhuman Agent Workspace, INCREMNT Training, Joti, Kenso, Kinevo, Kynra Fitness, Liftin', Liftosaur, LiftTrack, Lightweight, Motra, MoveMate: Gym Workout Tracker, Onyx Coach, Pacelab Intervals, Relay, Reps, SaltWOD Admin, STREEQ, StrengthCode, Trainerrr, UltraFit360, 今天训练 in ChatGPT Strength & Gym Workout Trackers, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.

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Competing in ChatGPT Strength & Gym Workout Trackers

19 tools agents can invoke