# Product Assembly Timer vs The Chippy Calc

The clearest difference is in-app purchases: Product Assembly Timer at none against The Chippy Calc's 3. Product Assembly Timer also leads on update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. The Chippy Calc sells 3 in-app purchases, starting at $3.99 per month. Product Assembly Timer asks for nothing beyond the download.

Product Assembly Timer ships an update every 3 weeks, The Chippy Calc every 2 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Product Assembly Timer | The Chippy Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/the-chippy-calc-builder-tools/id6499256065/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 80 MB | 76 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Roses Only](https://appshunter.io/developer/1470353946) | [Vike Digital Pty Ltd](https://appshunter.io/developer/1742926734) |

## What reviewers say

### Product Assembly Timer

[App page](https://appshunter.io/ios/app/product-assembly-timer/id1470353947)

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

**In-app purchases:** none


### The Chippy Calc

[App page](https://appshunter.io/ios/app/the-chippy-calc-builder-tools/id6499256065)

This app provides carpenters, builders, and DIYers with precise, visual construction calculations. It offers specialized tools for stairs, decks, rafters, and more, with support for both metric and imperial units. All calculations can be saved and accessed offline.

**Highlights:** Visual results with scaled diagrams, Metric and imperial unit support, Offline functionality, 14+ specialized construction calculators, Stair, deck, and rafter calculations, Linear cut list optimization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Annually | $19.99 | per year |
| Lifetime Premium Access | $79.99 | one-time |


## Frequently asked questions

### Is Product Assembly Timer free?

Product Assembly Timer is free to download, with no in-app purchases.

### Is The Chippy Calc free?

The Chippy Calc is free to download, with in-app purchases available.

### Do Product Assembly Timer or The Chippy Calc have ads?

Neither Product Assembly Timer nor The Chippy Calc shows ads.

### Which is updated more often, Product Assembly Timer or The Chippy Calc?

Product Assembly Timer ships an update every 3 weeks, and The Chippy Calc every 2 months. Most recently, Product Assembly Timer was updated on October 14, 2026 and The Chippy Calc on October 9, 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.*