# Stay Alive ∙ Water Tracker vs DayZero

The clearest difference is iOS requirement: DayZero at 15.0 against Stay Alive ∙ Water Tracker's 26.5. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stay Alive ∙ Water Tracker sells 3 in-app purchases, starting at $2.99 per month and DayZero sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Stay Alive ∙ Water Tracker | DayZero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Size | 28 MB | 30 MB |
| Requires iOS | 26.5 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Jeremy Sariaatmadja](https://appshunter.io/developer/6810538865) | [振杰 高](https://appshunter.io/developer/6805001259) |

## What reviewers say

### Stay Alive ∙ Water Tracker

[App page](https://appshunter.io/ios/app/stay-alive-water-tracker/id6810538863)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STAY.ALIVE Pro Monthly | $2.99 | per month |
| STAY.ALIVE Pro (Annual) | $12.99 | per year |
| STAY.ALIVE Pro Lifetime | $29.99 | one-time |


### DayZero

[App page](https://appshunter.io/ios/app/dayzero-quit-drinking-tracker/id6814439941)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DayZero Premium Weekly | $2.99 | per 7 days |
| DayZero Premium Monthly | $5.99 | per month |
| DayZero Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is Stay Alive ∙ Water Tracker free?

Stay Alive ∙ Water Tracker is free to download, with in-app purchases available.

### Is DayZero free?

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

### Do Stay Alive ∙ Water Tracker or DayZero have ads?

Neither Stay Alive ∙ Water Tracker nor DayZero shows ads.

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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.*