# Haila vs Solar Declination

The clearest difference is update cadence: Haila at fortnightly against Solar Declination's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Haila ships an update fortnightly, Solar Declination every 2 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Haila | Solar Declination |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 79 MB | 38 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Haila](https://appshunter.io/developer/1628101372) | [Rafael Guedes Alves](https://appshunter.io/developer/650179806) |

## What reviewers say

### Haila

[App page](https://appshunter.io/ios/app/haila/id1628101370)

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

**In-app purchases:** none


### Solar Declination

[App page](https://appshunter.io/ios/app/solar-declination/id6759112331)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Haila free?

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

### Is Solar Declination free?

Solar Declination is free to download, with no in-app purchases.

### Do Haila or Solar Declination have ads?

Neither Haila nor Solar Declination shows ads.

### Which is updated more often, Haila or Solar Declination?

Haila ships an update fortnightly, and Solar Declination every 2 months. Most recently, Haila was updated on October 12, 2026 and Solar Declination on October 5, 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.*