# Emoncms vs Octopus Watch

The clearest difference is price: Emoncms at Free against Octopus Watch's $1.99. Emoncms also leads on in-app purchases (none vs 2) and rating (4.4 vs 4.0). Octopus Watch's advantage is update cadence (every 3 weeks vs every 17 months) and review sentiment (65% vs 56%). On ads and device support there is nothing between them.

Emoncms is free to download; Octopus Watch costs $1.99 up front. Octopus Watch sells 2 in-app purchases, starting at $1.99 per month. Emoncms asks for nothing beyond the download.

Emoncms holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Emoncms has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 56% of Emoncms's written reviews are positive against 65% of Octopus Watch's, so the app with the better star average is not the one people write more warmly about.

Emoncms ships an update every 17 months, Octopus Watch every 3 weeks. The most recent releases landed on September 27, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Emoncms | Octopus Watch |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/emoncms/id1169483587/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/octopus-watch/id1490260614/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 55.6% of reviews | **64.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 36 MB | 18 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Megni](https://appshunter.io/developer/1169190655) | [Kim Bauters](https://appshunter.io/developer/1451850103) |

## What reviewers say

### Emoncms

[App page](https://appshunter.io/ios/app/emoncms/id1169483587)

This application allows users to view energy, temperature, and environmental data dashboards from Emoncms servers. It is an open-source tool designed for processing, logging, and visualizing environmental information.

**Highlights:** View Emoncms dashboards, Supports MyElectric dashboards, Connects to emoncms.org, Connects to custom Emoncms servers, Open-source application, Visualizes energy data, Visualizes environmental data

**Features:** macOS Compatibility

**In-app purchases:** none


### Octopus Watch

[App page](https://appshunter.io/ios/app/octopus-watch/id1490260614)

Easily manage your Octopus Energy tariffs, track electricity rates, and identify optimal times to use appliances or charge your EV. Offers insights into usage, weather impacts, and export earnings. Optional subscription unlocks advanced features like 48-hour rate predictions and carbon integration.

**Highlights:** Track current and upcoming electricity rates, Identify cheapest times for appliances/EV charging, View historic usage and micro metrics, Receive rate change alerts, Compare tariffs, Export data to CSV, 48h Agile rate predictions (subscription)

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $1.99 | per month |
| 1 Year Subscription | $11.99 | per year |


## Frequently asked questions

### Is Emoncms free?

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

### Is Octopus Watch free?

Octopus Watch costs $1.99, and also offers in-app purchases.

### Which has better reviews, Emoncms or Octopus Watch?

Emoncms is rated higher. Emoncms averages 4.4 out of 5 from 5 ratings, while Octopus Watch averages 4.0 from 1 ratings.

### Do Emoncms or Octopus Watch have ads?

Neither Emoncms nor Octopus Watch shows ads.

### Which is updated more often, Emoncms or Octopus Watch?

Emoncms ships an update every 17 months, and Octopus Watch every 3 weeks. Most recently, Emoncms was updated on September 27, 2026 and Octopus Watch on October 11, 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.*