# HKAStro vs SynAlign

The clearest difference is review sentiment: HKAStro at 100% against SynAlign's 50%. HKAStro also leads on rating (5.0 vs 4.0). SynAlign's advantage is iOS requirement (6.1 vs 13.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

HKAStro holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 100% of HKAStro's written reviews are positive against 50% of SynAlign's.

## The numbers

| Metric | HKAStro | SynAlign |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hkastro/id526273487/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/synalign/id882498693/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | — |
| Monetization | Free | Free |
| Size | 120 MB | 1 MB |
| Requires iOS | 13.0 | **6.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hong Kong Astronomical Society](https://appshunter.io/developer/526273530) | [Shenzhen Youhua Technology Company Limited](https://appshunter.io/developer/423977368) |

## What reviewers say

### HKAStro

[App page](https://appshunter.io/ios/app/hkastro/id526273487)

This educational app delivers local astronomical news, event updates, and weather forecasts. It includes helpful tools like a polar scope and moon phase tracker for stargazing enthusiasts.

**Highlights:** Local astronomical news, Event information, Weather forecasts, Polar Scope tool, Moon Phase tracker, Flashlight feature

**Features:** macOS Compatibility

**In-app purchases:** none


### SynAlign

[App page](https://appshunter.io/ios/app/synalign/id882498693)

This application assists users in polar aligning their Star Adventurer equatorial mount. It automatically determines your location to calculate the real-time star scene, guiding you to Polaris with on-screen arrows and indicating its position within the polar scope's view for precise alignment.

**Highlights:** Automatic location acquisition, Real-time star scene calculation, On-screen Polaris guidance, Polar scope view indicator, Precise polar alignment

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HKAStro free?

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

### Is SynAlign free?

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

### Which has better reviews, HKAStro or SynAlign?

HKAStro is rated higher. HKAStro averages 5.0 out of 5 from 2 ratings, while SynAlign averages 4.0 from 2 ratings.

### Do HKAStro or SynAlign have ads?

Neither HKAStro nor SynAlign shows ads.

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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.*