# Glug vs NutriScience AI

The clearest difference is update cadence: NutriScience AI at every 3 days against Glug's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Glug sells 3 in-app purchases, starting at $4.99 per month and NutriScience AI sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Glug ships an update every 6 weeks, NutriScience AI every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Glug | NutriScience AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/glug-pet-fish-water-tracker/id6767991759/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | Freemium | — |
| Size | 22 MB | 20 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [THOMAS JOHN GIRGASH](https://appshunter.io/developer/1896528302) | [Aditya Rai](https://appshunter.io/developer/1869071267) |

## What reviewers say

### Glug

[App page](https://appshunter.io/ios/app/glug-pet-fish-water-tracker/id6767991759)

This app uses a virtual pet fish to motivate you to drink water. Your fish's survival depends on you meeting your daily hydration goals, with consequences for missing them. Unlock decorations and expand your fish's world as you stay hydrated.

**Highlights:** Virtual pet fish survival mechanic, Personalized daily water goals, Log water intake to fill tank, Unlockable tank decorations, Push notifications with consequences, Widgets for tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Glug Pro | $4.99 | per month |
| Glug Pro | $19.99 | per year |
| Glug Pro - Lifetime | $29.99 | one-time |


### NutriScience AI

[App page](https://appshunter.io/ios/app/nutriscience-ai/id6769478956)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NutriScience AI Weekly | $0.99 | per 7 days |
| NutriScience AI Monthly | $2.99 | per month |
| NutriScience AI Annual | $29.99 | per year |


## Frequently asked questions

### Is Glug free?

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

### Is NutriScience AI free?

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

### Do Glug or NutriScience AI have ads?

Neither Glug nor NutriScience AI shows ads.

### Which is updated more often, Glug or NutriScience AI?

Glug ships an update every 6 weeks, and NutriScience AI every 3 days. Most recently, Glug was updated on October 25, 2026 and NutriScience AI 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.*