# Energy4Life vs The Function Lab

The clearest difference is update cadence: The Function Lab at fortnightly against Energy4Life's every 2 months. Energy4Life's advantage is iOS requirement (12.4 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Energy4Life ships an update every 2 months, The Function Lab fortnightly. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Energy4Life | The Function Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/energy4life/id1482400326/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 18 MB | 42 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [XPO Health Limited](https://appshunter.io/developer/1482400325) | [The Function Lab LLC](https://appshunter.io/developer/1879017761) |

## What reviewers say

### Energy4Life

[App page](https://appshunter.io/ios/app/energy4life/id1482400326)

Access your biofeedback data on the go using a Bluetooth device. Scan your energy levels and work with your practitioner to interpret results and receive personalized advice for improvement.

**Highlights:** Bluetooth biofeedback device integration, On-the-go data scanning, Practitioner collaboration, Energy level assessment, Personalized advice for improvement

**Features:** macOS Compatibility

**In-app purchases:** none


### The Function Lab

[App page](https://appshunter.io/ios/app/the-function-lab/id6759491502)

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

**In-app purchases:** none


## Frequently asked questions

### Is Energy4Life free?

Energy4Life is free to download, with no in-app purchases.

### Is The Function Lab free?

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

### Do Energy4Life or The Function Lab have ads?

Neither Energy4Life nor The Function Lab shows ads.

### Which is updated more often, Energy4Life or The Function Lab?

Energy4Life ships an update every 2 months, and The Function Lab fortnightly. Most recently, Energy4Life was updated on October 12, 2026 and The Function Lab on October 1, 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.*