# Chaptr vs Metal Calculator A1 Pro

The clearest difference is price: Metal Calculator A1 Pro at Free against Chaptr's $2.99. Metal Calculator A1 Pro also leads on iOS requirement (15.0 vs 26.6). Chaptr's advantage is review sentiment (100% vs 60%) and in-app purchases (none vs 4). On rating, ratings volume, ads and device support there is nothing between them.

Metal Calculator A1 Pro is free to download; Chaptr costs $2.99 up front. Metal Calculator A1 Pro sells 4 in-app purchases, starting at $1.99 per month. Chaptr asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.5 for Chaptr against 4.6 for Metal Calculator A1 Pro. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews are what separate them: 100% of Chaptr's written reviews are positive against 60% of Metal Calculator A1 Pro's.

Chaptr ships an update every 6 weeks, Metal Calculator A1 Pro every 6 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Chaptr | Metal Calculator A1 Pro |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/chaptr/id1148381183/reviews) | **[4.6 (5 ratings)](https://appshunter.io/ios/app/metal-calculator-a1-pro/id1589637862/reviews)** |
| Number of ratings | 2 | **5** |
| Positive reviews | **100.0% of reviews** | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Monetization | Paid | **Free** |
| Size | 1 MB | 94 MB |
| Requires iOS | 26.6 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Trauth](https://appshunter.io/developer/1073103749) | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) |

## What reviewers say

### Chaptr

[App page](https://appshunter.io/ios/app/chaptr/id1148381183)

Easily create chapter marks for audio productions on your iPhone or Apple Watch. Import audio files, add marks with simple clicks, and export them in various podcast-friendly formats. Adjust mark timing and listening speed for efficient workflow.

**Highlights:** Create chapter marks on iPhone and Apple Watch, Import audio from cloud services or web, Add marks with simple earbud clicks, Edit mark timecodes, Adjust playback speed, Export to multiple podcast formats

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### Metal Calculator A1 Pro

[App page](https://appshunter.io/ios/app/metal-calculator-a1-pro/id1589637862)

This app simplifies metal quantity calculations for various projects. It offers tools for calculating quantities, shapes, joints, and performing material tests. Supports both Imperial and Metric systems, with a wide range of metal types and converters.

**Highlights:** Quantity calculations for pipes, bars, sheets, and beams, Shape customization for metal bars, Detailed joint calculations (welded, bolted, riveted), Material testing (fatigue, bend, hardness, impact, tensile), Unit converters (length, volume, density), Support for various metal types and materials, Detailed reporting and user-friendly interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metal Monthly Subscription | $1.99 | per month |
| Metal Yearly Subscription | $12.99 | per year |
| Pro Version | $12.99 | one-time |
| Pro version | $12.99 | one-time |


## Frequently asked questions

### Is Chaptr free?

Chaptr costs $2.99, with no in-app purchases.

### Is Metal Calculator A1 Pro free?

Metal Calculator A1 Pro is free to download, with in-app purchases available.

### Which has better reviews, Chaptr or Metal Calculator A1 Pro?

Metal Calculator A1 Pro is rated higher. Chaptr averages 4.5 out of 5 from 2 ratings, while Metal Calculator A1 Pro averages 4.6 from 5 ratings.

### Do Chaptr or Metal Calculator A1 Pro have ads?

Neither Chaptr nor Metal Calculator A1 Pro shows ads.

### Which is updated more often, Chaptr or Metal Calculator A1 Pro?

Chaptr ships an update every 6 weeks, and Metal Calculator A1 Pro every 6 months. Most recently, Chaptr was updated on November 2, 2026 and Metal Calculator A1 Pro on November 3, 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.*