# iFour Core vs Decode Age

The clearest difference is in-app purchases: Decode Age at none against iFour Core's 2. Decode Age also leads on update cadence (weekly vs every 2 months). iFour Core's advantage is iOS requirement (11.0 vs 15.6). On price, ads 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. Decode Age asks for nothing beyond the download.

iFour Core ships an update every 2 months, Decode Age weekly. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | iFour Core | Decode Age |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (28 ratings)](https://appshunter.io/ios/app/ifour-core/id1525317554/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 107 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ifour.life, LLC](https://appshunter.io/developer/1525317556) | [CENTENARIANS LIFE SCIENCES PRIVATE LIMITED](https://appshunter.io/developer/1650062716) |

## What reviewers say

### 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 |


### Decode Age

[App page](https://appshunter.io/ios/app/decode-age/id6443857029)

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

**In-app purchases:** none


## Frequently asked questions

### Is iFour Core free?

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

### Is Decode Age free?

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

### Do iFour Core or Decode Age have ads?

Neither iFour Core nor Decode Age shows ads.

### Which is updated more often, iFour Core or Decode Age?

iFour Core ships an update every 2 months, and Decode Age weekly. Most recently, iFour Core was updated on October 4, 2026 and Decode Age on October 11, 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.*