# iSOQI EMD vs Vyyz

The clearest difference is in-app purchases: iSOQI EMD at none against Vyyz's 2. iSOQI EMD also leads on iOS requirement (10.0 vs 18.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Vyyz sells 2 in-app purchases, starting at $3.99 per month. iSOQI EMD asks for nothing beyond the download.

iSOQI EMD ships an update every 6 weeks, Vyyz every 3 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | iSOQI EMD | Vyyz |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | — | Subscription |
| Size | 23 MB | 28 MB |
| Requires iOS | **10.0** | 18.5 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [美利国际集团](https://appshunter.io/developer/1063635829) | [Tamas Bartal](https://appshunter.io/developer/896478676) |

## What reviewers say

### iSOQI EMD

[App page](https://appshunter.io/ios/app/isoqi-emd/id1078872933)

**Features:** macOS Compatibility

**In-app purchases:** none


### Vyyz

[App page](https://appshunter.io/ios/app/vyyz/id6746981331)

This app helps you track your daily water intake with simple, one-tap logging. It offers smart reminders, weather-based intelligence, and integrates with Apple Health, all while prioritizing your privacy with local data storage.

**Highlights:** One-tap water logging, Complete privacy with local storage, Apple Watch app and multi-device sync, Smart, schedule-aware reminders, Weather-based hydration nudges, Apple Health integration, Personalized daily goal calculator

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $3.99 | per month |
| One-year subscription | $44.99 | per year |


## Frequently asked questions

### Is iSOQI EMD free?

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

### Is Vyyz free?

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

### Do iSOQI EMD or Vyyz have ads?

Neither iSOQI EMD nor Vyyz shows ads.

### Which is updated more often, iSOQI EMD or Vyyz?

iSOQI EMD ships an update every 6 weeks, and Vyyz every 3 months. Most recently, iSOQI EMD was updated on November 2, 2026 and Vyyz on October 30, 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.*