# LONGEVITY vs HydroAI

The clearest difference is in-app purchases: LONGEVITY at none against HydroAI's 3. LONGEVITY also leads on device support (4 vs 2). HydroAI's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (13.4 vs 15.5). On price and ads there is nothing between them.

Both are free to download. HydroAI sells 3 in-app purchases, starting at $9.99 per month. LONGEVITY asks for nothing beyond the download.

LONGEVITY ships an update every 6 weeks, HydroAI every 3 weeks. The most recent releases landed on September 19, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | LONGEVITY | HydroAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydroai-hydration-tracker/id6676999718/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 166 MB | 58 MB |
| Requires iOS | 15.5 | **13.4** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Longevity FZE](https://appshunter.io/developer/1742232758) | [Syncd Software LLC](https://appshunter.io/developer/1767900025) |

## What reviewers say

### LONGEVITY

[App page](https://appshunter.io/ios/app/longevity-uk/id6499050646)

**Features:** Apple Wallet, Apple Watch app, Vision Pro support

**In-app purchases:** none


### HydroAI

[App page](https://appshunter.io/ios/app/hydroai-hydration-tracker/id6676999718)

Effortlessly track your daily water intake and receive personalized reminders to stay hydrated. Simply answer a few questions about your goals, snap a photo of your drink, and view insightful progress reports. Achieve a healthier, more vibrant you with simple hydration management.

**Highlights:** AI-powered hydration analysis, Drink photo recognition, Personalized hydration goals, Progress tracking and insights, Customizable reminders, Effortless daily tracking

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $46.90 | per year |
| Pro Yearly | $59.99 | per year |


## Frequently asked questions

### Is LONGEVITY free?

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

### Is HydroAI free?

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

### Do LONGEVITY or HydroAI have ads?

Neither LONGEVITY nor HydroAI shows ads.

### Which is updated more often, LONGEVITY or HydroAI?

LONGEVITY ships an update every 6 weeks, and HydroAI every 3 weeks. Most recently, LONGEVITY was updated on September 19, 2026 and HydroAI on September 12, 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.*