# Muscle Log: Workout & AI Coach — Best workout log — gym & home

> Workout tracker with AI coach for personalized fitness and nutrition plans. (iPhone/iPad app by KAISEI OTA.)

- Source: https://appshunter.io/ios/app/muscle-log-workout-and-ai-coach/id6774530379 (this page in markdown: same URL + `.md`)
- Developer: [KAISEI OTA](https://appshunter.io/developer/1836064221)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 26.2 · 46 MB
- Languages: American English, Japanese, Korean
- Released: 2026-06-15
- Data updated: 2026-08-27
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/muscle-log-workout-and-ai-coach/id6774530379/reviews.md

## What is Muscle Log?

Muscle Log is a workout tracker built around one goal: helping you stay consistent.
  
■ Effortless logging
- Start a session in one tap from a template—your last weights and reps carry over automatically
- Log on Apple Watch alone, even offline, then auto-sync to iPhone 
- See your progress by muscle group, personal records, and a training calendar
  
■ AI Personal Coach (Coach plan)
- Get "today's workout" tailored to your history and goals
- Chat about form, plateaus, and motivation
- Receive daily meal plans with PFC (protein/fat/carb) balance
- Just snap a photo of your meal to auto-log calories and nutrition
- Get an automatic weekly review report every Sunday
  
■ Privacy
- Detailed logs stay on your device. Only summaries and coach conversations go to the cloud
- Meal photos are discarded right after AI analysis 
- You can delete your account and data anytime from within the app
  
Note: The numbers and suggestions in this app are study aids and estimates only. They are not a substitute for medical diagnosis or treatment.
  
The Coach plan is an auto-renewing subscription: ¥780/month or ¥7,800/year, with a 7-day free trial. Cancel anytime.
Please review the following before using the app.
Terms of Use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
App Terms of Service: https://ohtakaisei.github.io/muscletraining-legal/terms.en.html
Privacy Policy: https://ohtakaisei.github.io/muscletraining-legal/privacy.en.html

## Key features

- Effortless workout logging
- Apple Watch offline logging
- Progress tracking by muscle group
- AI-powered personal coach
- Daily meal plans with nutrition balance
- Meal photo calorie logging
- Privacy-focused data storage

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| AI Coach (Monthly) | $4.99 | per month |
| AI Coach (Yearly) | $49.99 | per year |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/muscle-log-workout-and-ai-coach/id6774530379/reviews.md

### 5/5 — 課金なしで広告なしもなし！

*2026-06-16*

このアプリの良いところは、課金しなくても広告なしで普通にトレーニング記録を付けられるところ！今のところ不自由もなくいい感じ。

AIコーチについても無料でも十分使えると思う。

強いて言うなら、重量を変更する時に若干重くなる時がある？くらい。

## Frequently asked questions about Muscle Log

### What is Muscle Log?

Muscle Log is a workout tracker designed to help users stay consistent with their fitness routines. It offers features like effortless logging, progress visualization, and an AI personal coach for tailored guidance.

### Does Muscle Log have ads?

No, Muscle Log does not contain advertisements. The app offers a free tier for basic tracking and an optional subscription for advanced AI coaching features.

### What devices does Muscle Log support?

Muscle Log is available on Apple Watch, iPhone, and iPad, allowing users to log workouts seamlessly across their devices.

### How does the AI Personal Coach work in Muscle Log?

The AI Personal Coach provides daily workout suggestions based on your history and goals, offers chat support for form and motivation, and generates daily meal plans with PFC balance. It also provides a weekly review report.

### What are the subscription options for Muscle Log's AI Coach?

The AI Coach plan is available as a subscription with a 7-day free trial. Options include monthly at ¥780 or yearly at ¥7,800. You can cancel the subscription at any time.

### Is my workout data private with Muscle Log?

Yes, Muscle Log prioritizes privacy. Detailed workout logs are stored on your device, and only summaries and coach conversations are sent to the cloud. Meal photos are discarded after AI analysis.

### How often is Muscle Log updated?

The latest version of Muscle Log is 1.4.0, which was last updated on June 24, 2026. Updates typically include new features, bug fixes, and performance improvements.

### What is the age rating for Muscle Log?

Muscle Log has an age rating of 12+, making it suitable for teenagers and adults interested in fitness tracking and guidance.

## Version history (last 3 releases)

### 1.4.0 — 2026-06-24

New Sleep Tracking (Premium): measure heart rate, HRV, and sleep stages on Apple Watch, with a nightly sleep score, sleep bank, and readiness index. Plus a daily Recovery coaching card, finer muscle targeting (e.g., upper chest) with a body map, shareable achievement cards.

### 1.3.0 — 2026-06-16

What's New

• Added a quick "How it works" guide for first-time users.
  It walks you step by step through tapping +, picking an
  exercise, and logging your first workout (skippable anytime).
• You can now skip the initial goal survey and start using the
  app right away.
• Improved the AI Coach experience and overall stability.

Thanks for your feedback — happy training!

### 1.2.0 — 2026-06-16

No release notes.

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All apps by KAISEI OTA: https://appshunter.io/developer/1836064221

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*