# REDtone IoT vs HydroBot

The clearest difference is in-app purchases: REDtone IoT at none against HydroBot's 2. REDtone IoT also leads on iOS requirement (15.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. HydroBot sells 2 in-app purchases, starting at $1.99 per 7 days. REDtone IoT asks for nothing beyond the download.

REDtone IoT ships an update every 3 weeks, HydroBot monthly. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | REDtone IoT | HydroBot |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/hydrobot-phone-water-ejector/id6758790107/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | — | Freemium |
| Size | 37 MB | 11 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [REDtone Digital Berhad](https://appshunter.io/developer/1168561182) | [Talk or Not, Inc.](https://appshunter.io/developer/925631317) |

## What reviewers say

### REDtone IoT

[App page](https://appshunter.io/ios/app/redtone-iot/id6443580610)

**Features:** macOS Compatibility

**In-app purchases:** none


### HydroBot

[App page](https://appshunter.io/ios/app/hydrobot-phone-water-ejector/id6758790107)

This app uses specially tuned sound vibrations to help expel trapped water from your device's speakers. Simply tap to activate the sound and restore clearer audio after exposure to moisture.

**Highlights:** Water-ejection sound technology, One-tap activation, Minimalist interface, Lightweight and fast, Helps restore speaker clarity

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Water Ejector Premium | $1.99 | per 7 days |
| hydrobot lifetime | $4.99 | one-time |


## Frequently asked questions

### Is REDtone IoT free?

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

### Is HydroBot free?

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

### Do REDtone IoT or HydroBot have ads?

Neither REDtone IoT nor HydroBot shows ads.

### Which is updated more often, REDtone IoT or HydroBot?

REDtone IoT ships an update every 3 weeks, and HydroBot monthly. Most recently, REDtone IoT was updated on October 24, 2026 and HydroBot on October 31, 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.*