# Second Nature vs MutLab

The clearest difference is update cadence: Second Nature at every 2 days against MutLab's every 2 months. MutLab's advantage is iOS requirement (13.0 vs 16.4). 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.

Second Nature ships an update every 2 days, MutLab every 2 months. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Second Nature | MutLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (57 ratings)](https://appshunter.io/ios/app/second-nature/id885435960/reviews)** | — |
| Number of ratings | **57** | — |
| Positive reviews | 65.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 months |
| Monetization | Free | — |
| Size | 218 MB | 60 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Second Nature Health Ltd](https://appshunter.io/developer/885435963) | [Mutlab](https://appshunter.io/developer/1363984051) |

## What reviewers say

### Second Nature

[App page](https://appshunter.io/ios/app/second-nature/id885435960)

This app uses behavioral science to help you build healthy habits for long-term weight loss. It tracks sleep, exercise, and emotional regulation, offering personalized advice from a nutritionist and a library of recipes and educational articles.

**Highlights:** Behavioral science approach, Personalized nutritionist support, Holistic habit tracking (sleep, exercise, emotions), Healthy recipe library, Daily educational articles, Apple HealthKit integration

**Features:** Apple Wallet

**In-app purchases:** none


### MutLab

[App page](https://appshunter.io/ios/app/mutlab/id1576343740)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Second Nature free?

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

### Is MutLab free?

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

### Do Second Nature or MutLab have ads?

Neither Second Nature nor MutLab shows ads.

### Which is updated more often, Second Nature or MutLab?

Second Nature ships an update every 2 days, and MutLab every 2 months. Most recently, Second Nature was updated on September 24, 2026 and MutLab on September 21, 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.*