# Invoy vs Nutu

The clearest difference is rating: Invoy at 4.6 against Nutu's 4.0. Invoy also leads on in-app purchases (none vs 5) and review sentiment (89% vs 75%). Nutu's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Nutu sells 5 in-app purchases, starting at $9.99 per month. Invoy asks for nothing beyond the download.

Invoy holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 76 and 24 respectively. Written reviews point the same way: 89% of Invoy's written reviews are positive against 75% of Nutu's.

Invoy ships an update every 6 weeks, Nutu every 3 weeks. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Invoy | Nutu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (76 ratings)](https://appshunter.io/ios/app/invoy/id1444260845/reviews)** | [4.0 (24 ratings)](https://appshunter.io/ios/app/nutu/id6478635966/reviews) |
| Number of ratings | **76** | 24 |
| Positive reviews | **89.5% of reviews** | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 140 MB | 161 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Invoy](https://appshunter.io/developer/985872372) | [Willow Laboratories, Inc.](https://appshunter.io/developer/941846109) |

## What reviewers say

### Invoy

[App page](https://appshunter.io/ios/app/invoy/id1444260845)

This app helps users understand their fat burn through a breath-based device and track key wellness factors. An analyst team uses this data to provide personalized wellness insights, supporting serious commitment to health goals.

**Highlights:** Breath-based fat burn analysis, Key wellness factor tracking, Personalized wellness insights, HealthKit data integration (Weight), Enterprise/clinical deployment program

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

**In-app purchases:** none


### Nutu

[App page](https://appshunter.io/ios/app/nutu/id6478635966)

This app offers personalized guidance for healthier living and prediabetes management. It provides a unique score based on your daily habits and offers science-backed programs to help you achieve your wellness goals through small, sustainable changes.

**Highlights:** Personalized Nutu Score, Smart Food Tracking, Activity Tracking (100+ types), CDC-Based Diabetes Prevention Program, SMART Goal Setting, Certified Coaching (Premium)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diabetes Prevention Starter | $9.99 | per month |
| Healthy Living Starter | $9.99 | per month |
| Nutu Diabetes Prevention App | $9.99 | per month |
| Healthy Living w/ Coach | $29.99 | per month |
| Diabetes Prevention w/ Coach | $49.99 | per month |


## Frequently asked questions

### Is Invoy free?

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

### Is Nutu free?

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

### Which has better reviews, Invoy or Nutu?

Invoy is rated higher. Invoy averages 4.6 out of 5 from 76 ratings, while Nutu averages 4.0 from 24 ratings.

### Do Invoy or Nutu have ads?

Neither Invoy nor Nutu shows ads.

### Which is updated more often, Invoy or Nutu?

Invoy ships an update every 6 weeks, and Nutu every 3 weeks. Most recently, Invoy was updated on October 7, 2026 and Nutu on October 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.*