# QuiltingCalc vs PerchLens

The clearest difference is review sentiment: QuiltingCalc at 66% against PerchLens's 12%. QuiltingCalc also leads on rating (4.3 vs 1.9). PerchLens's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, ratings volume, in-app purchases and device support there is nothing between them.

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

QuiltingCalc holds the better App Store score, 4.3 against 1.9. Both are backed by a comparable volume of ratings — 147 and 337 respectively. Written reviews point the same way: 66% of QuiltingCalc's written reviews are positive against 12% of PerchLens's.

QuiltingCalc ships an update every 2 months, PerchLens every 3 weeks. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | QuiltingCalc | PerchLens |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (147 ratings)](https://appshunter.io/ios/app/quiltingcalc/id390366459/reviews)** | [1.9 (337 ratings)](https://appshunter.io/ios/app/perchlens/id6473670884/reviews) |
| Number of ratings | 147 | **337** |
| Positive reviews | **65.8% of reviews** | 12.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 53 MB | 201 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Handmade Interactive LLC](https://appshunter.io/developer/390366462) | [POCKET INC](https://appshunter.io/developer/1717359545) |

## What reviewers say

### QuiltingCalc

[App page](https://appshunter.io/ios/app/quiltingcalc/id390366459)

This app offers eight essential quilting calculators to simplify fabric calculations. It helps with conversions, determining fabric needs for backing, borders, and binding, and calculating piece cuts from larger fabric pieces. It also includes specialized calculators for common quilting blocks and triangles.

**Highlights:** Fabric measurement conversion (yards/inches, meters/cm), Backing and batting yardage calculation, Piece cutting from larger fabric, Binding fabric calculation, Border fabric calculation, Square-in-a-square block dimensions, Triangle calculations for blocks

**In-app purchases:** none

**What reviewers like**

- 🎯 Accurate fabric calculations for borders, bindings, and backing
- ⚡ Quick and easy-to-use interface for on-the-go shopping
- 💰 Free app with valuable quilting functionality
- 🔄 Reliable performance for most users over extended periods
- 📱 Helpful tool for beginners learning quilting math

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 🐛 App won't open or gets stuck on loading screen
- 🐛 Back button navigation doesn't work properly
- 🐛 Unable to exit app and return to enter new measurements
- ⚠️ Calculation errors for certain fabric widths (especially 108" backing)

**Reported bugs**

- App crashes on startup or during use
- Freezes on title/loading screen indefinitely
- Black screen errors when exiting app
- Back button ('<') doesn't function
- Cannot return to previous screens to modify inputs

**Requested features**

- Metric to imperial conversion tool
- Landscape mode and full iPad support
- Default settings for binding strip width (2.5") and border type
- Wide-backing fabric support (108 inch)
- Quilt size templates (baby, lap, throw sizes)


### PerchLens

[App page](https://appshunter.io/ios/app/perchlens/id6473670884)

This app enhances bird watching by integrating camera technology with bird feeders to capture images of visiting birds. It offers enthusiasts an innovative way to observe and engage with local wildlife.

**Highlights:** Camera-enabled bird feeder, Captures images of visiting birds, Innovative nature engagement, High-tech bird watching, Feathered friends observation

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Works well
- 🚀 Feeder works perfectly
- 👍 Accurate AI recognizer

**What reviewers complain about**

- 🐛 Motion detection too sensitive
- 🐛 Difficult to set up
- 🐛 Unreliable connection
- 🐛 Inaccurate AI bird identification
- 🐛 Camera quality issues

**Reported bugs**

- Inconsistent video recording and storage
- Inability to connect to Wi-Fi
- Login and account issues
- Compatibility problems with newer OS versions

**Requested features**

- Option to turn off AI bird identification
- Improved squirrel deterrent features
- Ability to share videos and photos
- Compatibility with smart home platforms
- Better battery life management


## Frequently asked questions

### Is QuiltingCalc free?

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

### Is PerchLens free?

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

### Which has better reviews, QuiltingCalc or PerchLens?

QuiltingCalc is rated higher. QuiltingCalc averages 4.3 out of 5 from 147 ratings, while PerchLens averages 1.9 from 337 ratings.

### Do QuiltingCalc or PerchLens have ads?

QuiltingCalc shows ads; PerchLens does not.

### Which is updated more often, QuiltingCalc or PerchLens?

QuiltingCalc ships an update every 2 months, and PerchLens every 3 weeks. Most recently, QuiltingCalc was updated on October 23, 2026 and PerchLens on October 27, 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.*