# PhoneIoT vs Mermaid Maths

The clearest difference is update cadence: PhoneIoT at every 2 weeks against Mermaid Maths's every 58 months. PhoneIoT also leads on ratings volume (4 vs 1) and iOS requirement (13.0 vs 15.6). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for PhoneIoT against 5.0 for Mermaid Maths. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

PhoneIoT ships an update every 2 weeks, Mermaid Maths every 58 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | PhoneIoT | Mermaid Maths |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/phoneiot/id1567444865/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/mermaid-maths/id1567468963/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 58 months |
| Monetization | Free | Free |
| Size | 22 MB | 39 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Devin Jean](https://appshunter.io/developer/1567444957) | [L&L Programming LLC](https://appshunter.io/developer/1289929597) |

## What reviewers say

### PhoneIoT

[App page](https://appshunter.io/ios/app/phoneiot/id1567444865)

This app connects to a block-based programming environment, enabling remote access to your device's sensors and display. Students can create interactive projects, like using their device as a remote control for robots.

**Highlights:** Connects to NetsBlox educational programming environment, Remotely access iOS device sensors, Control device display from code, Create engaging programming projects, Enable device as robot remote control

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

**In-app purchases:** none


### Mermaid Maths

[App page](https://appshunter.io/ios/app/mermaid-maths/id1567468963)

This educational game helps children practice addition skills in a fun, underwater environment. Players earn treasure by solving math problems, which can then be used to customize their underwater world with new friends and backgrounds.

**Highlights:** Addition practice, Earn treasure rewards, Customize underwater scenes, Unlock new friends, Multiple backgrounds, Interactive gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PhoneIoT free?

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

### Is Mermaid Maths free?

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

### Which has better reviews, PhoneIoT or Mermaid Maths?

PhoneIoT and Mermaid Maths are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do PhoneIoT or Mermaid Maths have ads?

Neither PhoneIoT nor Mermaid Maths shows ads.

### Which is updated more often, PhoneIoT or Mermaid Maths?

PhoneIoT ships an update every 2 weeks, and Mermaid Maths every 58 months. Most recently, PhoneIoT was updated on November 3, 2026 and Mermaid Maths on November 3, 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.*