# Brainy Builder vs Demex

The clearest difference is in-app purchases: Demex at none against Brainy Builder's 3. Brainy Builder's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Brainy Builder sells 3 in-app purchases, starting at $0.99 per month. Demex asks for nothing beyond the download.

Brainy Builder ships an update every 3 weeks, Demex every 3 months. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Brainy Builder | Demex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/brainy-builder-pro-calculator/id1539913001/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Freemium | — |
| Size | 49 MB | 240 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beyond Code AB](https://appshunter.io/developer/1539913003) | [Demex AB](https://appshunter.io/developer/1694524575) |

## What reviewers say

### Brainy Builder

[App page](https://appshunter.io/ios/app/brainy-builder-pro-calculator/id1539913001)

This app offers a suite of tools for carpenters, simplifying complex calculations for measurements, spacing, and project planning. It supports both metric and imperial units, with free and expanded pro versions available.

**Highlights:** Metric and Imperial unit support, 8 free carpentry calculators, Equal spacing calculation, Parquet floor planning, Stair stringer calculation, Rafter calculations, Live drawing functionality

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| All formulas | Free | one-time |
| Pro | $11.99 | one-time |


### Demex

[App page](https://appshunter.io/ios/app/demex/id6450712397)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Brainy Builder free?

Brainy Builder is free to download, with in-app purchases available.

### Is Demex free?

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

### Do Brainy Builder or Demex have ads?

Neither Brainy Builder nor Demex shows ads.

### Which is updated more often, Brainy Builder or Demex?

Brainy Builder ships an update every 3 weeks, and Demex every 3 months. Most recently, Brainy Builder was updated on October 17, 2026 and Demex on October 2, 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.*