# Strong Workout Tracker Gym Log vs Flex AI Workout Trainer & Log

The clearest difference is rating: Strong Workout Tracker Gym Log at 4.9 against Flex AI Workout Trainer & Log's 4.6. Strong Workout Tracker Gym Log also leads on ratings volume (108K vs 2.4K) and chart position (#68 vs unranked). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Strong Workout Tracker Gym Log sells 11 in-app purchases, starting at $3.99 per month and Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Strong Workout Tracker Gym Log holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Strong Workout Tracker Gym Log has 108K ratings behind it against 2.4K, so its average is the more settled of the two. Written reviews complicate that: 65% of Strong Workout Tracker Gym Log's written reviews are positive against 69% of Flex AI Workout Trainer & Log's, so the app with the better star average is not the one people write more warmly about.

Strong Workout Tracker Gym Log ships an update every 2 weeks, Flex AI Workout Trainer & Log every 9 days. The most recent releases landed on September 27, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Strong Workout Tracker Gym Log | Flex AI Workout Trainer & Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (108K ratings)](https://appshunter.io/ios/app/strong-workout-tracker-gym-log/id464254577/reviews)** | [4.6 (2.4K ratings)](https://appshunter.io/ios/app/flex-ai-workout-trainer-and-log/id1446354547/reviews) |
| Number of ratings | **108K** | 2.4K |
| Positive reviews | 65.2% of reviews | **69.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Freemium | Freemium |
| Best chart rank | **#68** | — |
| Size | 129 MB | 574 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Strong Fitness PTE Limited](https://appshunter.io/developer/1525345716) | [Flex Artificial Intelligence Inc.](https://appshunter.io/developer/1446354546) |

## What reviewers say

### Strong Workout Tracker Gym Log

[App page](https://appshunter.io/ios/app/strong-workout-tracker-gym-log/id464254577)

**Currently charting:** #68 Top Grossing · Health & Fitness, #205 Top Free · Health & Fitness (US App Store)

This app helps you track your workouts and progress with an intuitive interface. It offers a wide range of exercises, detailed instructions, and advanced statistics to help you achieve your fitness goals. Easily log your routines, monitor personal records, and stay motivated on your fitness journey.

**Highlights:** Intuitive workout logging, Comprehensive exercise library, Apple Watch integration, Advanced progress statistics, Customizable routines, Cloud data backup

**Features:** Siri integration, Apple Watch app

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Strong PRO | $3.99 | per month |
| Strong PRO (1 Month) | $4.99 | per month |
| Strong PRO (6 Months) | $19.99 | per 6 months |
| Strong PRO (1 Year) | $23.99 | per year |
| Strong PRO (1 Year) | $29.99 | per year |
| Strong PRO (1 Year) | $29.99 | per year |
| Power Pack (Legacy) | $3.99 | one-time |
| Unlock Strong (Legacy) | $4.99 | one-time |
| Unlock + Power Pack (Legacy) | $6.99 | one-time |
| Strong PRO Forever | $79.99 | one-time |
| Strong PRO Forever | $99.99 | one-time |

**What reviewers like**

- 🚀 Excellent workout tracking
- 👍 Clean, intuitive interface
- 📊 Comprehensive data and progress tracking
- ⌚ Seamless Apple Watch integration
- 🔍 Extensive exercise library

**What reviewers complain about**

- 🔋 High battery consumption
- 🔒 Concerns about subscription model and pricing
- 🐛 Apple Watch app issues and syncing problems
- 🔧 Difficulty editing or deleting exercises/routines

**Reported bugs**

- Workouts not syncing properly between devices
- Exercises disappearing from saved routines
- Crashes and stability issues, especially on Apple Watch

**Requested features**

- Add ability to track body part volume and focus
- Improve exercise search and categorization
- Implement more advanced analytics and reporting
- Allow pausing of workouts on Apple Watch
- Add support for more workout types (e.g. cardio)


### Flex AI Workout Trainer & Log

[App page](https://appshunter.io/ios/app/flex-ai-workout-trainer-and-log/id1446354547)

This app uses AI to provide personalized workout plans and real-time form feedback for weightlifters. It tracks progress, offers adaptive progression, and includes motivational features like leaderboards and streaks. It's designed for all experience levels, from beginners to pros.

**Highlights:** AI personal trainer, Real-time form feedback, Personalized workout plans, Adaptive progression, Strength tracking, Community leaderboards, Apple Watch integration

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription Monthly | $1.99 | per month |
| Premium Plus Monthly | $2.99 | per month |
| Premium Yearly Subscription | $9.99 | per year |
| Premium Plus Family Monthly | $9.99 | per month |
| Premium Plus Yearly | $19.99 | per year |
| Premium Plus Family Yearly | $49.99 | per year |
| 1 Month Free Premium | Free | one-time |
| Lifetime Free Premium | Free | one-time |

**What reviewers like**

- 🚀 Detailed workout tracking
- 👍 Customizable workouts
- 🔒 Comprehensive exercise library
- 💡 Helpful progress tracking
- 👍 Clean and intuitive interface

**What reviewers complain about**

- 🐛 Glitches and bugs
- 💰 Expensive premium subscription
- 🔒 Limited functionality without premium
- 🐛 Inconsistent rest timer
- 🐛 Workout data loss

**Reported bugs**

- App crashes on iOS 16 update
- Inability to log workouts on previous days
- Inconsistent syncing between app and Apple Watch

**Requested features**

- Offline workout mode
- Ability to save and reuse custom workout plans
- Muscle group targeting and analytics
- Social features and community integration


## Frequently asked questions

### Is Strong Workout Tracker Gym Log free?

Strong Workout Tracker Gym Log is free to download, with in-app purchases available.

### Is Flex AI Workout Trainer & Log free?

Flex AI Workout Trainer & Log is free to download, with in-app purchases available.

### Which has better reviews, Strong Workout Tracker Gym Log or Flex AI Workout Trainer & Log?

Strong Workout Tracker Gym Log is rated higher. Strong Workout Tracker Gym Log averages 4.9 out of 5 from 108K ratings, while Flex AI Workout Trainer & Log averages 4.6 from 2.4K ratings.

### Do Strong Workout Tracker Gym Log or Flex AI Workout Trainer & Log have ads?

Neither Strong Workout Tracker Gym Log nor Flex AI Workout Trainer & Log shows ads.

### Which is updated more often, Strong Workout Tracker Gym Log or Flex AI Workout Trainer & Log?

Strong Workout Tracker Gym Log ships an update every 2 weeks, and Flex AI Workout Trainer & Log every 9 days. Most recently, Strong Workout Tracker Gym Log was updated on September 27, 2026 and Flex AI Workout Trainer & Log on September 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*