# CelsiUSA vs DaySky Forecast

The clearest difference is in-app purchases: DaySky Forecast at none against CelsiUSA's 1. DaySky Forecast also leads on update cadence (fortnightly 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. DaySky Forecast asks for nothing beyond the download.

CelsiUSA ships an update every 7 months, DaySky Forecast fortnightly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CelsiUSA | DaySky Forecast |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 12 MB | 3 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Myers](https://appshunter.io/developer/1636750818) | [Tiago Galvao](https://appshunter.io/developer/6784019952) |

## 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 |


### DaySky Forecast

[App page](https://appshunter.io/ios/app/daysky-forecast/id6808738955)

**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 DaySky Forecast free?

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

### Do CelsiUSA or DaySky Forecast have ads?

Neither CelsiUSA nor DaySky Forecast shows ads.

### Which is updated more often, CelsiUSA or DaySky Forecast?

CelsiUSA ships an update every 7 months, and DaySky Forecast fortnightly. Most recently, CelsiUSA was updated on November 7, 2026 and DaySky Forecast on October 31, 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.*