# Flex AI Workout Trainer & Log vs TRNR

The clearest difference is in-app purchases: TRNR at none against Flex AI Workout Trainer & Log's 8. TRNR also leads on review sentiment (100% vs 69%) and iOS requirement (13.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 per month. TRNR asks for nothing beyond the download.

Flex AI Workout Trainer & Log ships an update every 9 days, TRNR every 10 days. The most recent releases landed on October 14, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Flex AI Workout Trainer & Log | TRNR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (2.4K ratings)](https://appshunter.io/ios/app/flex-ai-workout-trainer-and-log/id1446354547/reviews)** | — |
| Number of ratings | **2.4K** | — |
| Positive reviews | 69.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 10 days |
| Monetization | Freemium | **Free** |
| Size | 574 MB | 22 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Flex Artificial Intelligence Inc.](https://appshunter.io/developer/1446354546) | [TRNR](https://appshunter.io/developer/1650536111) |

## What reviewers say

### 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 | $12.99 | per month |
| Premium Plus Monthly | $29.99 | per month |
| Premium Plus Family Monthly | $69.99 | per month |
| Premium Yearly Subscription | $79.99 | per year |
| Premium Plus Yearly | $191.99 | per year |
| Premium Plus Family Yearly | $499.99 | 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


### TRNR

[App page](https://appshunter.io/ios/app/trnr/id1660701665)

Access a wide range of high-quality workout guides with video and image demonstrations. Whether you're a beginner or an experienced athlete, find the equipment and guidance to achieve your fitness goals and maintain a healthy lifestyle. Save your favorite workouts for easy access anytime.

**Highlights:** High-quality workout guides, Video and image demonstrations, Equipment and guidance for all levels, Save and bookmark favorite workouts, Achieve fitness goals, Stay healthy

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

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

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

### Is TRNR free?

TRNR is free to download, with no in-app purchases.

### Do Flex AI Workout Trainer & Log or TRNR have ads?

Neither Flex AI Workout Trainer & Log nor TRNR shows ads.

### Which is updated more often, Flex AI Workout Trainer & Log or TRNR?

Flex AI Workout Trainer & Log ships an update every 9 days, and TRNR every 10 days. Most recently, Flex AI Workout Trainer & Log was updated on October 14, 2026 and TRNR on September 27, 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.*