# Water Reminder vs Stack

The clearest difference is update cadence: Stack at every 3 days against Water Reminder's weekly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Water Reminder sells 5 in-app purchases, starting at $1.99 per 7 days and Stack sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Water Reminder ships an update weekly, Stack every 3 days. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Water Reminder | Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/water-reminder-brim/id6777476351/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 9 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | +12 | 4+ |
| Developer | [SYRNIK LTD](https://appshunter.io/developer/6777476353) | [Henry Hinge](https://appshunter.io/developer/6784458312) |

## What reviewers say

### Water Reminder

[App page](https://appshunter.io/ios/app/water-reminder-brim/id6777476351)

This app helps you stay hydrated by reminding you to drink water throughout the day. It allows you to log various beverages and accounts for their different hydration levels. Enjoy convenient logging with widgets and ensure your data remains private on your device.

**Highlights:** Personalized hydration reminders, Log diverse beverage types, Accounts for drink hydration differences, Home and Lock Screen widgets, Private data storage on device, Customizable quick sips

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Brim Premium (Weekly) | $1.99 | per 7 days |
| Brim Premium (Weekly) | $2.99 | per 7 days |
| Brim Premium (Yearly) | $24.99 | per year |
| Brim Premium (Yearly) | $29.99 | per year |
| Brim Premium (Lifetime) | $39.99 | one-time |


### Stack

[App page](https://appshunter.io/ios/app/stack-supplement-tracker/id6784458310)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Pro | $5.99 | per month |
| Stack Pro | $39.99 | per year |


## Frequently asked questions

### Is Water Reminder free?

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

### Is Stack free?

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

### Do Water Reminder or Stack have ads?

Neither Water Reminder nor Stack shows ads.

### Which is updated more often, Water Reminder or Stack?

Water Reminder ships an update weekly, and Stack every 3 days. Most recently, Water Reminder was updated on October 4, 2026 and Stack on October 10, 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.*