# Topology3D vs Hydrator

The clearest difference is in-app purchases: Topology3D at none against Hydrator's 3. Hydrator's advantage is update cadence (every 5 days vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Hydrator sells 3 in-app purchases, starting at $0.99 per month. Topology3D asks for nothing beyond the download.

Topology3D ships an update every 6 months, Hydrator every 5 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | Topology3D | Hydrator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (4 ratings)](https://appshunter.io/ios/app/hydrator-smart-hydration/id6751470498/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 33 MB | 81 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Yazan Sharkia](https://appshunter.io/developer/1791633230) | [Jonathan Terry](https://appshunter.io/developer/1372094093) |

## What reviewers say

### Topology3D

[App page](https://appshunter.io/ios/app/topology3d/id6742383494)

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydrator

[App page](https://appshunter.io/ios/app/hydrator-smart-hydration/id6751470498)

This app helps you effortlessly stay hydrated with personalized reminders and easy drink tracking. Set custom goals, monitor your progress, and sync with health platforms for a complete wellness experience.

**Highlights:** Personalized water goals, Smart, adaptive reminders, Easy logging for all beverages, Streaks and badges for motivation, Apple Health and Google Fit integration, Distraction-free design

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydrator Pro - Monthly | $0.99 | per month |
| Hydrator Pro - Yearly | $9.99 | per year |
| Hydrator Pro Perpetual | $19.99 | one-time |


## Frequently asked questions

### Is Topology3D free?

Topology3D is free to download, with no in-app purchases.

### Is Hydrator free?

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

### Do Topology3D or Hydrator have ads?

Neither Topology3D nor Hydrator shows ads.

### Which is updated more often, Topology3D or Hydrator?

Topology3D ships an update every 6 months, and Hydrator every 5 days. Most recently, Topology3D was updated on October 30, 2026 and Hydrator 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.*