# Polar Scope Align Pro vs DuoCorder+

The clearest difference is ratings volume: Polar Scope Align Pro at 310 against DuoCorder+'s 1. Polar Scope Align Pro also leads on iOS requirement (13.0 vs 17.0). DuoCorder+'s advantage is chart position (#59 vs unranked) and price ($2.99 vs $4.99). On rating, ads, in-app purchases and device support there is nothing between them.

Polar Scope Align Pro costs $4.99 and DuoCorder+ $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Polar Scope Align Pro against 5.0 for DuoCorder+. That said, the two scores are not equally well evidenced: Polar Scope Align Pro has 310 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Polar Scope Align Pro | DuoCorder+ |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | [4.9 (310 ratings)](https://appshunter.io/ios/app/polar-scope-align-pro/id970161373/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/duocorder-plus/id6822322155/reviews)** |
| Number of ratings | **310** | 1 |
| Positive reviews | 96.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#59** |
| Size | 33 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) | [James Roche](https://appshunter.io/developer/1896491450) |

## What reviewers say

### Polar Scope Align Pro

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

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:** none

**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


### DuoCorder+

[App page](https://appshunter.io/ios/app/duocorder-plus/id6822322155)

**Currently charting:** #59 Top Paid · Utilities (US App Store)

Transform your iPhone into a handheld sensor scanner. Explore environmental data like sound, air pressure, and magnetic fields with a retro-futuristic interface. Set custom alerts and track 24-hour trends for your sensor readings.

**Highlights:** Live sensor scanning, Retro-futuristic display, Customizable alerts, 24-hour trend charts, Metal detector mode, Data export (CSV), Privacy-focused design

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

**In-app purchases:** none


## Frequently asked questions

### Is Polar Scope Align Pro free?

Polar Scope Align Pro costs $4.99, with no in-app purchases.

### Is DuoCorder+ free?

DuoCorder+ costs $2.99, with no in-app purchases.

### Which has better reviews, Polar Scope Align Pro or DuoCorder+?

DuoCorder+ is rated higher. Polar Scope Align Pro averages 4.9 out of 5 from 310 ratings, while DuoCorder+ averages 5.0 from 1 ratings.

### Do Polar Scope Align Pro or DuoCorder+ have ads?

Neither Polar Scope Align Pro nor DuoCorder+ 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.*