# Polar Scope Align vs Local Sidereal Time

The clearest difference is ads: Local Sidereal Time at none against Polar Scope Align's shown. Local Sidereal Time also leads on ratings volume (1.1K vs 173). Polar Scope Align's advantage is review sentiment (91% vs 71%) and iOS requirement (13.0 vs 15.0). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. Polar Scope Align 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.

On the App Store both sit at effectively the same score — 4.7 for Polar Scope Align against 4.7 for Local Sidereal Time. That said, the two scores are not equally well evidenced: Local Sidereal Time has 1.1K ratings behind it against 173, so its average is the more settled of the two. Written reviews are what separate them: 91% of Polar Scope Align's written reviews are positive against 71% of Local Sidereal Time's.

Polar Scope Align ships an update every 2 months, Local Sidereal Time every 4 months. The most recent releases landed on October 21, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Polar Scope Align | Local Sidereal Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (173 ratings)](https://appshunter.io/ios/app/polar-scope-align/id970157965/reviews) | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/local-sidereal-time/id1256725300/reviews)** |
| Number of ratings | 173 | **1.1K** |
| Positive reviews | **91.3% of reviews** | 70.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 23 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

[App page](https://appshunter.io/ios/app/polar-scope-align/id970157965)

This app calculates the precise position of celestial poles in your telescope's polar scope reticle for accurate alignment. It supports a wide range of reticles and corrects for atmospheric refraction, offering precision even at lower latitudes. Features include night mode, moon phase, and astronomical databases.

**Highlights:** Polaris/Sigma Octantis position calculation, Atmospheric refraction correction, Reticle centering error correction, Supports numerous reticle types, Red-color night mode, Moon phase and astronomical databases

**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**

- 🎯 Extensive reticle options for various telescope mounts
- 👍 User-friendly and intuitive interface
- 🆓 Powerful free version with no popup ads
- 🔴 Red night vision mode preserves dark adaptation
- 📍 Accurate GPS-based location detection

**What reviewers complain about**

- 🐛 Inconsistent accuracy with metal mounts/tripods
- 📱 Font size too small for comfortable reading
- 🎯 Center dot in reticle obscures precise alignment
- 📍 Limited effectiveness for southern hemisphere (Sigma Octantis is dim)
- ❓ Steep learning curve for beginners without proper guidance

**Reported bugs**

- Date and time dial do not match correctly
- GMT and LST times appear to be switched
- App crashes or fails to initialize for some users
- Alignment accuracy varies inconsistently between sessions
- Location detection issues with cell tower vs GPS

**Requested features**

- Online video tutorials demonstrating all features
- Remove or reduce center dot size in reticle
- Larger, bolder font options for better readability
- Brighter star options for southern hemisphere alignment
- Smaller ad button or ad customization


### 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 free?

Polar Scope Align is free to download, with in-app purchases available.

### Is Local Sidereal Time free?

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

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

Local Sidereal Time is rated higher. Polar Scope Align averages 4.7 out of 5 from 173 ratings, while Local Sidereal Time averages 4.7 from 1.1K ratings.

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

Polar Scope Align shows ads; Local Sidereal Time does not.

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

Polar Scope Align ships an update every 2 months, and Local Sidereal Time every 4 months. Most recently, Polar Scope Align was updated on October 21, 2026 and Local Sidereal Time on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*