# Invoy+ vs Sugar

The clearest difference is in-app purchases: Invoy+ at none against Sugar's 2. Sugar's advantage is update cadence (every 4 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sugar sells 2 in-app purchases, starting at $4.99 per month. Invoy+ asks for nothing beyond the download.

Invoy+ ships an update fortnightly, Sugar every 4 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Invoy+ | Sugar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/invoy-plus/id6773406343/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free | — |
| Size | 99 MB | 71 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Invoy](https://appshunter.io/developer/985872372) | [Andy Tang](https://appshunter.io/developer/6787578678) |

## What reviewers say

### Invoy+

[App page](https://appshunter.io/ios/app/invoy-plus/id6773406343)

Understand your metabolism with daily breath tests and personalized guidance. Track your fat burn, weight, and key health metrics to see how your habits impact your results. Designed for those seeking data-driven insights for lasting health changes.

**Highlights:** Daily fat burn measurement via breath test, Track weight and health metrics, Analyze habit impact on metabolism, Personalized guidance and insights, Monitor progress with trends, Integrates with Apple Health

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

**In-app purchases:** none


### Sugar

[App page](https://appshunter.io/ios/app/sugar-glucose-logger/id6787578676)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sugar Pro (Monthly) | $4.99 | per month |
| Sugar Pro Yearly | $44.99 | per year |


## Frequently asked questions

### Is Invoy+ free?

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

### Is Sugar free?

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

### Do Invoy+ or Sugar have ads?

Neither Invoy+ nor Sugar shows ads.

### Which is updated more often, Invoy+ or Sugar?

Invoy+ ships an update fortnightly, and Sugar every 4 days. Most recently, Invoy+ was updated on October 24, 2026 and Sugar on October 24, 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.*