# IRNBY vs The Flex

The clearest difference is review sentiment: IRNBY at 79% against The Flex's 43%. IRNBY also leads on rating (5.0 vs 4.8). The Flex's advantage is in-app purchases (none vs 26). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. IRNBY sells 26 one-off in-app purchases. The Flex asks for nothing beyond the download.

IRNBY holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 30 and 28 respectively. Written reviews point the same way: 79% of IRNBY's written reviews are positive against 43% of The Flex's.

IRNBY ships an update fortnightly, The Flex every 3 weeks. The most recent releases landed on September 22, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | IRNBY | The Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (30 ratings)](https://appshunter.io/ios/app/irnby/id1484553613/reviews)** | [4.8 (28 ratings)](https://appshunter.io/ios/app/the-flex/id6474018774/reviews) |
| Number of ratings | **30** | 28 |
| Positive reviews | **78.6% of reviews** | 43.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 245 MB | 63 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anastasia Mironova](https://appshunter.io/developer/1484553612) | [ООО «ФЛЕКС ИРКУТСК»](https://appshunter.io/developer/1720348929) |

## What reviewers say

### IRNBY

[App page](https://appshunter.io/ios/app/irnby/id1484553613)

This app offers a comprehensive approach to fitness and health, combining expert-designed workout programs with personalized meal plans and psychological support. Achieve your goals with video-guided exercises, tailored nutrition for weight loss, gain, or maintenance, and recipes. It focuses on sustainable results and building long-term healthy habits.

**Highlights:** Expert-designed workout programs, Personalized meal plans, Video-guided exercises, Nutrition for weight loss, gain, or maintenance, Over 80 unique recipes, Psychological support, 30-day courses for sustainable results

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (26)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Похудение-Жиросжигание | $2.99 | one-time |
| Здоровая осанка | $29.99 | one-time |
| Жиросжигание I | $39.99 | one-time |
| Фитнес-резинки (полный курс) | $39.99 | one-time |
| Жиросжигание II | $44.99 | one-time |
| Рельефный пресс II | $44.99 | one-time |
| Ограниченные нагрузки I | $44.99 | one-time |
| Ограниченные нагрузки II | $44.99 | one-time |
| Рельефный пресс I | $44.99 | one-time |
| Силовой II | $44.99 | one-time |
| Силовой I | $44.99 | one-time |
| Функциональный I | $44.99 | one-time |
| Антицеллюлитный II | $44.99 | one-time |
| Фитнес-резинки I | $44.99 | one-time |
| Фитнес-резинки II | $44.99 | one-time |
| Для зала I | $44.99 | one-time |
| Антицеллюлитный I | $44.99 | one-time |
| Для зала II | $44.99 | one-time |
| Новичок (полный курс) | $44.99 | one-time |
| Базовый (полный курс) | $47.99 | one-time |
| Домашний круговой(полный курс) | $47.99 | one-time |
| Красивая осанка и гибкая спина | $47.99 | one-time |
| Похудение-Жиросжигание (full) | $47.99 | one-time |
| Продвинутый (полный курс) | $47.99 | one-time |
| Тренировки на низ тела (full) | $47.99 | one-time |
| Тренировки при больных коленях | $47.99 | one-time |


### The Flex

[App page](https://appshunter.io/ios/app/the-flex/id6474018774)

Stay updated with studio news and schedules. Receive timely notifications about changes and special offers. Manage your fitness journey with ease.

**Highlights:** Studio news updates, Schedule tracking, Timely notifications, Special offers, Information on changes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient app release
- 👍 Clear schedule on app
- 👍 Good user experience overall

**What reviewers complain about**

- 🐌 Slow loading times
- 🐛 Frequent errors and crashes
- ❌ Difficult to book/cancel
- ❌ Missing website features
- ❌ Poor design and interface

**Reported bugs**

- App is disabled/not working
- Login errors
- Cannot authorize in app
- App crashes frequently
- Error 1019 when booking

**Requested features**

- Add ability to see number of people in queue
- Add ability to see available spots in schedule
- Return website functionality
- Improve schedule visibility (color coding, booking marks)
- Allow booking more than 6 sessions


## Frequently asked questions

### Is IRNBY free?

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

### Is The Flex free?

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

### Which has better reviews, IRNBY or The Flex?

IRNBY is rated higher. IRNBY averages 5.0 out of 5 from 30 ratings, while The Flex averages 4.8 from 28 ratings.

### Do IRNBY or The Flex have ads?

Neither IRNBY nor The Flex shows ads.

### Which is updated more often, IRNBY or The Flex?

IRNBY ships an update fortnightly, and The Flex every 3 weeks. Most recently, IRNBY was updated on September 22, 2026 and The Flex on September 29, 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.*