Zoa vs Polar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zoa
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Unlock the full potential of your solar power! Seamlessly monitor and optimise your solar and batteries to maximise savings. - Connect directly to your home battery - Visualise your real-time home usage, solar, battery and grid - Turn on AI-powered optimisation to maximise your savings
Polar
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The Polar-ESS App uses an API and connects to your Polar-ESS Cloud Monitoring account. The APP provides basic information about your Home Energy Demand, Solar PV Generation, Grid import energy and Battery Usage To view the Privacy Policy and EULA please visit the links provided in the app, or visit https://givenergy.co.uk/website-privacy-policy/ and https://polar-ess.co.uk/terms/ respectively.
Screenshots
Verdict
The clearest difference is in-app purchases: Zoa at none against Polar's 1. Zoa also leads on update cadence (every 9 days vs every 5 weeks) and iOS requirement (15.1 vs 17.4). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Polar sells 1 in-app purchase, starting at $25.00 per year. Zoa asks for nothing beyond the download.
Zoa ships an update every 9 days, Polar every 5 weeks. The most recent releases landed on September 19, 2026 and September 5, 2026 respectively.
| Parameter | Zoa | Polar |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.4 |
| Further details — not scored | ||
| Size | 58 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | Zoa Technology | GivEnergy Software Limited |
In-app purchases
Zoa
No in-app purchases
Polar
- Yearly Subscription1 Year trial$25.001 Year
