# Sun WEG vs On

The clearest difference is iOS requirement: Sun WEG at 13.0 against On's 15.1. 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.

Sun WEG ships an update monthly, On every 5 weeks. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Sun WEG | On |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (11 ratings)](https://appshunter.io/ios/app/on-charge/id6443683498/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | 10.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 47 MB | 61 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | +4 | 4+ |
| Developer | [WEG Equipamentos Eletricos S/A](https://appshunter.io/developer/575847223) | [On Charge](https://appshunter.io/developer/1648351173) |

## What reviewers say

### Sun WEG

[App page](https://appshunter.io/ios/app/sun-weg/id1618484332)

Monitor and manage your photovoltaic plant's generation factors. The system continuously analyzes your equipment and operators to prevent unwanted downtime that impacts energy production.

**Highlights:** Control photovoltaic plant generation factors, Continuous equipment analysis, Operator monitoring, Prevent unwanted downtime, Optimize energy production

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

**In-app purchases:** none


### On

[App page](https://appshunter.io/ios/app/on-charge/id6443683498)

This app helps electric vehicle owners manage their charging sessions. It provides real-time data on energy consumption and costs, locates nearby charging stations, and allows for remote control of charging. Users can track their charging history and view insightful statistics.

**Highlights:** Locate nearby charging stations, Start/Stop charging sessions, Real-time energy and cost tracking, Charging history and statistics, Environmental impact indicator, QR Code station lookup

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

**In-app purchases:** none


## Frequently asked questions

### Is Sun WEG free?

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

### Is On free?

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

### Do Sun WEG or On have ads?

Neither Sun WEG nor On shows ads.

### Which is updated more often, Sun WEG or On?

Sun WEG ships an update monthly, and On every 5 weeks. Most recently, Sun WEG was updated on October 7, 2026 and On on October 15, 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.*