# Fitain vs Flex AI Workout Trainer & Log

The clearest difference is update cadence: Flex AI Workout Trainer & Log at every 9 days against Fitain's every 6 weeks. Fitain's advantage is review sentiment (78% vs 69%) and iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Fitain sells 4 in-app purchases, starting at $4.99 per month and Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Fitain ships an update every 6 weeks, Flex AI Workout Trainer & Log every 9 days. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Fitain | Flex AI Workout Trainer & Log |
| --- | --- | --- |
| 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 | **77.8% of reviews** | 69.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | Freemium | Freemium |
| Size | 68 MB | 574 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 17+ |
| Developer | [L33 Solutions Ltd.](https://appshunter.io/developer/1446022167) | [Flex Artificial Intelligence Inc.](https://appshunter.io/developer/1446354546) |

## What reviewers say

### Fitain

[App page](https://appshunter.io/ios/app/fitain/id1446022168)

Log workouts with precision, track your progress, and discover over 3,000 exercises. Fitness professionals can also sell training programs and scale their business. Integrates with popular wearables and fitness apps.

**Highlights:** Log workouts with precision, Track progress over time, Access 3,000+ exercise videos, Sell training programs, Integrate with wearables, Discover pro-planned workouts, Manage clients and payments

**Features:** Apple Wallet

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter Monthly | $4.99 | per month |
| Premium Pro Monthly | $9.99 | per month |
| Supporter Yearly | $39.99 | per year |
| Premium Pro Yearly | $99.99 | per year |


### 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


## Frequently asked questions

### Is Fitain free?

Fitain 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.

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

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

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

Fitain ships an update every 6 weeks, and Flex AI Workout Trainer & Log every 9 days. Most recently, Fitain was updated on October 19, 2026 and Flex AI Workout Trainer & Log 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.*