CelsiUSA vs ER Weather
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CelsiUSA
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CelsiUSA is our app to help you switch to Celsius the easy way. Most of the world uses Celsius, but the US still uses Fahrenheit. Change is hard, but also good and it's time for us to change Celsius to the standard. Privacy: https://doorhingeparkour.com/privacypolicy.html EULA: https://doorhingeparkour.com/eula.html
ER Weather
This weather app prioritizes privacy and uses a unique forecast system to predict severe weather events like tornadoes and thunderstorms. It aims for high accuracy while minimizing resource usage.
- Privacy-focused design
- Custom severe weather prediction
- Tornado and thunderstorm alerts
- Lightning and hail detection
- Wind and snow squall forecasts
- Resource-efficient operation
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A light privacy focused weather app that uses a custom forecast system to predict phenomenas like tornadoes, severe thunderstorms, hail, lightning, powerful winds, snow squalls and others. Trying to achieve the most accurate forecast possible with the least resources.
Screenshots
Verdict
The clearest difference is in-app purchases: ER Weather at none against CelsiUSA's 1. ER Weather also leads on update cadence (weekly vs every 7 months). On price, ads, device support and iOS requirement 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. CelsiUSA sells 1 one-off in-app purchase. ER Weather asks for nothing beyond the download.
CelsiUSA ships an update every 7 months, ER Weather weekly. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.
| Parameter | CelsiUSA | ER Weather |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 7 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew Myers | JEAN-MARIE BOIS |
In-app purchases
CelsiUSA
- Remove Ads$1.99
ER Weather
No in-app purchases
