# CelsiUSA vs ER Weather

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.

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.

## The numbers

| Metric | CelsiUSA | ER Weather |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/er-weather/id6739453877/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | — | Free |
| Size | 12 MB | 5 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Myers](https://appshunter.io/developer/1636750818) | [JEAN-MARIE BOIS](https://appshunter.io/developer/1785409206) |

## What reviewers say

### CelsiUSA

[App page](https://appshunter.io/ios/app/celsiusa/id6449006027)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### ER Weather

[App page](https://appshunter.io/ios/app/er-weather/id6739453877)

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.

**Highlights:** Privacy-focused design, Custom severe weather prediction, Tornado and thunderstorm alerts, Lightning and hail detection, Wind and snow squall forecasts, Resource-efficient operation

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

**In-app purchases:** none


## Frequently asked questions

### Is CelsiUSA free?

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

### Is ER Weather free?

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

### Do CelsiUSA or ER Weather have ads?

Neither CelsiUSA nor ER Weather shows ads.

### Which is updated more often, CelsiUSA or ER Weather?

CelsiUSA ships an update every 7 months, and ER Weather weekly. Most recently, CelsiUSA was updated on October 1, 2026 and ER Weather on October 3, 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.*