# Glassful vs 4Level

The clearest difference is iOS requirement: Glassful at 17.0 against 4Level's 26.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Glassful sells 3 in-app purchases, starting at $2.99 per month and 4Level sells 2 in-app purchases, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

Glassful ships an update every 2 weeks, 4Level weekly. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Glassful | 4Level |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 19 MB | 8 MB |
| Requires iOS | **17.0** | 26.1 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KeyToTech](https://appshunter.io/developer/1883352204) | [Robert Poetzsch](https://appshunter.io/developer/1860642630) |

## What reviewers say

### Glassful

[App page](https://appshunter.io/ios/app/glassful-water-tracker/id6816299464)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Annual | $12.99 | per year |
| Premium Lifetime | $24.99 | one-time |


### 4Level

[App page](https://appshunter.io/ios/app/4level/id6816633802)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4Level Pro Yearly | $1.99 | per year |
| 4Level Lifetime | $8.99 | one-time |


## Frequently asked questions

### Is Glassful free?

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

### Is 4Level free?

4Level is free to download, with in-app purchases available.

### Do Glassful or 4Level have ads?

Neither Glassful nor 4Level shows ads.

### Which is updated more often, Glassful or 4Level?

Glassful ships an update every 2 weeks, and 4Level weekly. Most recently, Glassful was updated on October 29, 2026 and 4Level on October 31, 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.*