# Longevity Deck vs Water Bunny

The clearest difference is in-app purchases: Longevity Deck at none against Water Bunny's 1. Longevity Deck also leads on update cadence (every 4 days vs every 4 months) and iOS requirement (18.5 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. Water Bunny sells 1 one-off in-app purchase. Longevity Deck asks for nothing beyond the download.

Longevity Deck ships an update every 4 days, Water Bunny every 4 months. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Longevity Deck | Water Bunny |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (10 ratings)](https://appshunter.io/ios/app/longevity-deck/id6753670965/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Monetization | Free | — |
| Size | 78 MB | 17 MB |
| Requires iOS | **18.5** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [HYPE4MOBILE MALEWICZ I WSPOLNICY SPOŁKA JAWNA](https://appshunter.io/developer/501938616) | [Popcorn Labs Inc.](https://appshunter.io/developer/685049320) |

## What reviewers say

### Longevity Deck

[App page](https://appshunter.io/ios/app/longevity-deck/id6753670965)

Track over 125 science-backed health protocols, from sauna and cold plunge to sleep optimization and supplements. Get automatic updates based on the latest research and expert recommendations. Prioritizes user privacy with no account or data collection required.

**Highlights:** Track 125+ science-backed protocols, Automatic research updates, Visual timeline tracking, Privacy-focused, no account needed, Optional Apple HealthKit integration, Home screen widgets for key metrics

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

**In-app purchases:** none


### Water Bunny

[App page](https://appshunter.io/ios/app/water-bunny-hydration-tracker/id6760983007)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Water Bunny Pro | $2.99 | one-time |


## Frequently asked questions

### Is Longevity Deck free?

Longevity Deck is free to download, with no in-app purchases.

### Is Water Bunny free?

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

### Do Longevity Deck or Water Bunny have ads?

Neither Longevity Deck nor Water Bunny shows ads.

### Which is updated more often, Longevity Deck or Water Bunny?

Longevity Deck ships an update every 4 days, and Water Bunny every 4 months. Most recently, Longevity Deck was updated on October 13, 2026 and Water Bunny on October 25, 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.*