# Flex AI Workout Trainer & Log vs NextRep

The clearest difference is ads: Flex AI Workout Trainer & Log at none against NextRep's shown. Flex AI Workout Trainer & Log also leads on ratings volume (2.4K vs 1). NextRep's advantage is rating (5.0 vs 4.6) and iOS requirement (15.5 vs 18.0). On price, update cadence, in-app purchases and monetization model 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 and NextRep sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

NextRep holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flex AI Workout Trainer & Log has 2.4K ratings behind it against 1, so its average is the more settled of the two.

Flex AI Workout Trainer & Log ships an update every 9 days, NextRep every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Flex AI Workout Trainer & Log | NextRep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (2.4K ratings)](https://appshunter.io/ios/app/flex-ai-workout-trainer-and-log/id1446354547/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nextrep-ai-workout-planner/id6756631748/reviews)** |
| Number of ratings | **2.4K** | 1 |
| Positive reviews | 69.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 574 MB | 111 MB |
| Requires iOS | 18.0 | **15.5** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Flex Artificial Intelligence Inc.](https://appshunter.io/developer/1446354546) | [AppStack X](https://appshunter.io/developer/1805054245) |

## 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


### NextRep

[App page](https://appshunter.io/ios/app/nextrep-ai-workout-planner/id6756631748)

This AI-powered fitness planner creates personalized workout routines based on your experience, equipment, and goals. It tracks your progress, manages recovery, and offers a large exercise library with video guides.

**Highlights:** AI-generated custom workout routines, Progressive overload tracking, Injury management safeguards, Detailed gym logging (sets, reps, weight, RPE), Rest timer and history analysis, 1,700+ exercises with video instructions, Home and gym workout compatibility

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NextRep Monthly | $7.99 | per month |
| NextRep Annual | $39.99 | per year |
| English US | $9.99 | one-time |


## 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 NextRep free?

NextRep is free to download, with in-app purchases available.

### Which has better reviews, Flex AI Workout Trainer & Log or NextRep?

NextRep is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while NextRep averages 5.0 from 1 ratings.

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

NextRep shows ads; Flex AI Workout Trainer & Log does not.

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

Flex AI Workout Trainer & Log ships an update every 9 days, and NextRep every 2 weeks. Most recently, Flex AI Workout Trainer & Log was updated on October 24, 2026 and NextRep on October 24, 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.*