# Polar Scope Align Pro vs Local Sidereal Time

The clearest difference is price: Local Sidereal Time at Free against Polar Scope Align Pro's $3.99. Local Sidereal Time also leads on ratings volume (1.1K vs 309). Polar Scope Align Pro's advantage is review sentiment (97% vs 71%) and rating (4.9 vs 4.7). On ads, in-app purchases, monetization model and device support there is nothing between them.

Local Sidereal Time is free to download; Polar Scope Align Pro costs $3.99 up front. Polar Scope Align Pro sells 3 one-off in-app purchases and Local Sidereal Time sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Polar Scope Align Pro holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 309 and 1.1K respectively. Written reviews point the same way: 97% of Polar Scope Align Pro's written reviews are positive against 71% of Local Sidereal Time's.

Polar Scope Align Pro ships an update every 2 months, Local Sidereal Time every 4 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Polar Scope Align Pro | Local Sidereal Time |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.9 (309 ratings)](https://appshunter.io/ios/app/polar-scope-align-pro/id970161373/reviews)** | [4.7 (1.1K ratings)](https://appshunter.io/ios/app/local-sidereal-time/id1256725300/reviews) |
| Number of ratings | 309 | **1.1K** |
| Positive reviews | **96.7% of reviews** | 70.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#104** | — |
| Size | 33 MB | 20 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) | [Scott Spiller](https://appshunter.io/developer/1256725299) |

## What reviewers say

### Polar Scope Align Pro

[App page](https://appshunter.io/ios/app/polar-scope-align-pro/id970161373)

**Currently charting:** #104 Top Paid · Utilities (US App Store)

This app assists astronomers with precise polar alignment for telescopes, offering tools for various reticles and low-latitude accuracy. It also includes a comprehensive suite of astro tools, from object databases to calculators and weather reports.

**Highlights:** Accurate polar alignment calculation, Support for numerous polar scope reticles, Daytime/no polarscope alignment tool, Deep Space Object database, Astrophotography calculators, World astro-weather report

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip 1x | $0.99 | one-time |
| Tip 4x | $3.99 | one-time |
| Tip 10x | $9.99 | one-time |

**What reviewers like**

- 🚀 Best Polar Alignment App
- 👍 Detailed Instructions and Explanations
- 👍 Fantastic App with Many Useful Features
- 👍 Intuitive and No Distractions
- 👍 Comprehensive Astronomy App

**What reviewers complain about**

- 🐛 Compass Inaccurate
- 🐛 Location Data Inaccurate

**Reported bugs**

- Weather Updates Not Working
- Compass Deflected by Mount

**Requested features**

- Add Observation Recording Feature
- Add Push To Option for DSO Objects


### Local Sidereal Time

[App page](https://appshunter.io/ios/app/local-sidereal-time/id1256725300)

This app calculates local sidereal time, a system astronomers use to locate celestial objects. It can also be used for personal development, with studies suggesting increased psychic abilities during specific sidereal times. The pro version offers advanced features like notifications and map-based calculations.

**Highlights:** Calculate local sidereal time, Astronomy celestial object location, Potential psychic ability enhancement, Pro version notifications, Pro version map-based calculation, Pro version date/time conversion

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Useful app
- 💡 Helpful notifications
- 👍 Great customer service
- 💡 Excellent tool

**What reviewers complain about**

- 🐛 Alarm doesn't work
- 🐛 Crashes frequently
- 🔒 Pro purchase issues
- 🐛 Notification issues

**Reported bugs**

- Alarm doesn't work
- Crashes when loading
- Notification issues
- Pro purchase restoration not working

**Requested features**

- Add alarm feature
- Allow setting location manually
- Improve notification handling
- Automatically adjust for daylight saving time


## Frequently asked questions

### Is Polar Scope Align Pro free?

Polar Scope Align Pro costs $3.99, and also offers in-app purchases.

### Is Local Sidereal Time free?

Local Sidereal Time is free to download, with in-app purchases available.

### Which has better reviews, Polar Scope Align Pro or Local Sidereal Time?

Polar Scope Align Pro is rated higher. Polar Scope Align Pro averages 4.9 out of 5 from 309 ratings, while Local Sidereal Time averages 4.7 from 1.1K ratings.

### Do Polar Scope Align Pro or Local Sidereal Time have ads?

Neither Polar Scope Align Pro nor Local Sidereal Time shows ads.

### Which is updated more often, Polar Scope Align Pro or Local Sidereal Time?

Polar Scope Align Pro ships an update every 2 months, and Local Sidereal Time every 4 months. Most recently, Polar Scope Align Pro was updated on October 24, 2026 and Local Sidereal Time on October 24, 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.*