# Architect's Formulator vs CAftrade

The clearest difference is ads: Architect's Formulator at none against CAftrade's shown. CAftrade's advantage is update cadence (every 9 days vs every 2 months) and iOS requirement (11.0 vs 18.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Architect's Formulator sells 1 one-off in-app purchase and CAftrade sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Architect's Formulator ships an update every 2 months, CAftrade every 9 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Architect's Formulator | CAftrade |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/architects-formulator/id310925486/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Paid | — |
| Size | 37 MB | 63 MB |
| Requires iOS | 18.6 | **11.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Qihong(Chongqing)Technology Co., Ltd.](https://appshunter.io/developer/1575166254) |

## What reviewers say

### Architect's Formulator

[App page](https://appshunter.io/ios/app/architects-formulator/id310925486)

A comprehensive professional calculator for architects, engineers, and construction professionals. It offers over 2,000 formulas across structural, electrical, mechanical, plumbing, and carpentry disciplines, along with unit conversions and reference tables.

**Highlights:** Over 2,000 professional formulas, US and Metric unit conversions, Save and export calculations, Favorite frequently used calculators, Reference tables and ADA guidelines

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $5.99 | one-time |


### CAftrade

[App page](https://appshunter.io/ios/app/caftrade/id1587579064)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package for new users | $0.99 | one-time |
| In-chat transl  100 chances | $0.99 | one-time |
| Publish  50 chances | $1.99 | one-time |
| Publish  80 chances | $2.99 | one-time |
| Publish  150 chances | $4.99 | one-time |
| AI translation  50 chances | $4.99 | one-time |
| Publish  300 chances | $7.99 | one-time |
| AI translation  100 chances | $7.99 | one-time |
| AI translation  300 chances | $14.99 | one-time |
| AI translation  500 chances | $25.99 | one-time |


## Frequently asked questions

### Is Architect's Formulator free?

Architect's Formulator is free to download, with in-app purchases available.

### Is CAftrade free?

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

### Do Architect's Formulator or CAftrade have ads?

CAftrade shows ads; Architect's Formulator does not.

### Which is updated more often, Architect's Formulator or CAftrade?

Architect's Formulator ships an update every 2 months, and CAftrade every 9 days. Most recently, Architect's Formulator was updated on October 6, 2026 and CAftrade on October 8, 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.*