# VMR Classic vs HydroAI

The clearest difference is in-app purchases: VMR Classic at none against HydroAI's 3. HydroAI's advantage is update cadence (every 3 weeks vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

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

VMR Classic ships an update every 13 months, HydroAI every 3 weeks. The most recent releases landed on September 14, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | VMR Classic | 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 13 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 7 MB | 58 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Fluidlogic, Inc.](https://appshunter.io/developer/1494959180) | [Syncd Software LLC](https://appshunter.io/developer/1767900025) |

## What reviewers say

### VMR Classic

[App page](https://appshunter.io/ios/app/vmr-classic/id1494959181)

**Features:** macOS Compatibility

**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 VMR Classic free?

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

### Is HydroAI free?

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

### Do VMR Classic or HydroAI have ads?

Neither VMR Classic nor HydroAI shows ads.

### Which is updated more often, VMR Classic or HydroAI?

VMR Classic ships an update every 13 months, and HydroAI every 3 weeks. Most recently, VMR Classic was updated on September 14, 2026 and HydroAI on June 1, 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.*