# MudWatt Explorer vs Roosevelt UFSD

The clearest difference is device support: MudWatt Explorer at 3 against Roosevelt UFSD's 1. MudWatt Explorer also leads on iOS requirement (8.0 vs 16.0). On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | MudWatt Explorer | Roosevelt UFSD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (14 ratings)](https://appshunter.io/ios/app/mudwatt-explorer/id813029960/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | Every 6 months |
| Monetization | Free | — |
| Size | 100 MB | 124 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Trygve Enterprises LLC](https://appshunter.io/developer/813029963) | [Roosevelt UFSD](https://appshunter.io/developer/1713981665) |

## What reviewers say

### MudWatt Explorer

[App page](https://appshunter.io/ios/app/mudwatt-explorer/id813029960)

This app helps you track the power output and bacteria population of your MudWatt device. It provides graphical data, allows sharing, and includes an educational comic about microbial life. Unlock new story chapters by achieving higher power and population levels.

**Highlights:** Measure and track MudWatt power, Estimate and track bacteria population, Record and share power data, Educational comic about microbes, Unlock comic chapters with progress

**Features:** macOS Compatibility

**In-app purchases:** none


### Roosevelt UFSD

[App page](https://appshunter.io/ios/app/roosevelt-ufsd/id6470677464)

**In-app purchases:** none


## Frequently asked questions

### Is MudWatt Explorer free?

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

### Is Roosevelt UFSD free?

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

### Do MudWatt Explorer or Roosevelt UFSD have ads?

Neither MudWatt Explorer nor Roosevelt UFSD shows ads.

### Which is updated more often, MudWatt Explorer or Roosevelt UFSD?

MudWatt Explorer ships an update every 6 months, and Roosevelt UFSD every 6 months. Most recently, MudWatt Explorer was updated on October 5, 2026 and Roosevelt UFSD on October 6, 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.*