# Abs Smash vs iFour Core

The clearest difference is in-app purchases: Abs Smash at none against iFour Core's 2. Abs Smash also leads on ratings volume (398 vs 28). iFour Core's advantage is review sentiment (100% vs 70%) and rating (5.0 vs 4.7). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. iFour Core sells 2 in-app purchases, starting at $5.99 per month. Abs Smash asks for nothing beyond the download.

iFour Core holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Abs Smash has 398 ratings behind it against 28, so its average is the more settled of the two. Written reviews point the same way: 70% of Abs Smash's written reviews are positive against 100% of iFour Core's.

Abs Smash ships an update every 4 months, iFour Core every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Abs Smash | iFour Core |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (398 ratings)](https://appshunter.io/ios/app/abs-smash-daily-core-workout/id1456450614/reviews) | **[5.0 (28 ratings)](https://appshunter.io/ios/app/ifour-core/id1525317554/reviews)** |
| Number of ratings | **398** | 28 |
| Positive reviews | 70.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 94 MB | 39 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [ranknoodle LLc](https://appshunter.io/developer/1035152808) | [ifour.life, LLC](https://appshunter.io/developer/1525317556) |

## What reviewers say

### Abs Smash

[App page](https://appshunter.io/ios/app/abs-smash-daily-core-workout/id1456450614)

Achieve your dream 6-pack abs and a flatter tummy with this guided core workout program. Follow daily exercises designed to increase intensity over 30 days, suitable for all fitness levels. Track your progress visually with before and after photos.

**Highlights:** 30-day ab fitness challenge, Daily core workouts, Progress tracking, Before and after image storage, Beginner, intermediate, and advanced levels, 6 workouts with 15 exercise variations

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

**In-app purchases:** none

**What reviewers like**

- 👍 Free and easy to use
- 💪 Effective for workouts and motivation
- 💯 Works as advertised for results
- ✨ Clean interface
- ✅ Good for all fitness levels

**What reviewers complain about**

- 🐛 App failure and configuration errors
- 📉 UI design issues
- 💸 Forced to pay for workouts
- ❌ App not working after update
- 🚫 Rest days not completing

**Reported bugs**

- ERROR 23: Configuration issue
- Cannot click Pro for intermediate/advanced workouts
- Progress tracking error
- Rest days do not complete
- App doesn't work after update

**Requested features**

- Allow modification of challenges
- Fix rest day completion bug
- Improve UI design
- Fix configuration errors
- Enable progress tracking without errors


### iFour Core

[App page](https://appshunter.io/ios/app/ifour-core/id1525317554)

This app offers a personalized core workout program designed by physical therapists. It adapts to your individual anatomy and fitness level, providing daily workouts under 10 minutes with video demonstrations. Access nutrition guides and trainer support as a member.

**Highlights:** Personalized core workout program, Physical therapy approved exercises, Daily workouts under 10 minutes, Video demonstrations of exercises, Nutrition guides and support, Fitness test for customized plans

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $5.99 | per month |
| Annually | $29.99 | per year |


## Frequently asked questions

### Is Abs Smash free?

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

### Is iFour Core free?

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

### Which has better reviews, Abs Smash or iFour Core?

iFour Core is rated higher. Abs Smash averages 4.7 out of 5 from 398 ratings, while iFour Core averages 5.0 from 28 ratings.

### Do Abs Smash or iFour Core have ads?

Neither Abs Smash nor iFour Core shows ads.

### Which is updated more often, Abs Smash or iFour Core?

Abs Smash ships an update every 4 months, and iFour Core every 2 months. Most recently, Abs Smash was updated on November 2, 2026 and iFour Core on November 3, 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.*