# Polar Scope Align vs Butterfly Identifier

The clearest difference is review sentiment: Polar Scope Align at 91% against Butterfly Identifier's 0%. Polar Scope Align also leads on rating (4.7 vs 1.0) and monetization model (free with in-app purchases vs subscription). Butterfly Identifier's advantage is ads (none vs shown). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Polar Scope Align sells 3 one-off in-app purchases and Butterfly Identifier sells 1 in-app purchase, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Polar Scope Align holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Polar Scope Align has 173 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 91% of Polar Scope Align's written reviews are positive against 0% of Butterfly Identifier's.

## The numbers

| Metric | Polar Scope Align | Butterfly Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (173 ratings)](https://appshunter.io/ios/app/polar-scope-align/id970157965/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/butterfly-identifier-moth-id/id1630885839/reviews) |
| Number of ratings | **173** | 2 |
| Positive reviews | **91.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | — |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 24 MB | 9 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) | [Tolkyn Raimbayeva](https://appshunter.io/developer/1692087944) |

## 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


### Butterfly Identifier

[App page](https://appshunter.io/ios/app/butterfly-identifier-moth-id/id1630885839)

Instantly identify butterflies and moths from photos with a vast database and high accuracy. Unlock full access to all features with a monthly subscription.

**Highlights:** Instant photo processing, High accuracy identification, Extensive database, Monthly subscription for full access

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Butterfly ID Full Access | $9.99 | per month |


## Frequently asked questions

### Is Polar Scope Align free?

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

### Is Butterfly Identifier free?

Butterfly Identifier is free to download, with in-app purchases available.

### Which has better reviews, Polar Scope Align or Butterfly Identifier?

Polar Scope Align is rated higher. Polar Scope Align averages 4.7 out of 5 from 173 ratings, while Butterfly Identifier averages 1.0 from 2 ratings.

### Do Polar Scope Align or Butterfly Identifier have ads?

Polar Scope Align shows ads; Butterfly Identifier does not.

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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.*