# Keep Charged vs OnSun

The clearest difference is in-app purchases: Keep Charged at none against OnSun's 3. Keep Charged also leads on iOS requirement (11.0 vs 16.0). OnSun's advantage is update cadence (every 11 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. OnSun sells 3 in-app purchases, starting at $2.99 per month. Keep Charged asks for nothing beyond the download.

Keep Charged ships an update every 2 months, OnSun every 11 days. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Keep Charged | OnSun |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 17 MB | 47 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Operative Tecnologia](https://appshunter.io/developer/1463195252) | [VIREO ENERGY PTY LTD](https://appshunter.io/developer/1874785734) |

## What reviewers say

### Keep Charged

[App page](https://appshunter.io/ios/app/keep-charged/id1466294136)

Find nearby establishments offering charging stations for your devices. Filter by amenities like Wi-Fi and restrooms. Receive notifications when your battery is low.

**Highlights:** Find charging points on a map, Filter by Wi-Fi and restrooms, Low battery notifications, Discover partner promotions, Information on partner events, Contact support

**Features:** macOS Compatibility

**In-app purchases:** none


### OnSun

[App page](https://appshunter.io/ios/app/onsun-rooftop-solar-forecast/id6758746647)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $2.99 | per month |
| OnSun Pro (Yearly) | $24.99 | per year |
| Pro | $24.99 | per year |


## Frequently asked questions

### Is Keep Charged free?

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

### Is OnSun free?

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

### Do Keep Charged or OnSun have ads?

Neither Keep Charged nor OnSun shows ads.

### Which is updated more often, Keep Charged or OnSun?

Keep Charged ships an update every 2 months, and OnSun every 11 days. Most recently, Keep Charged was updated on October 26, 2026 and OnSun on October 28, 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.*