# Design and Technology vs Engineering Formulas

The clearest difference is price: Engineering Formulas at Free against Design and Technology's $1.99. Engineering Formulas also leads on update cadence (every 2 months vs every 4 months). Design and Technology's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Engineering Formulas is free to download; Design and Technology costs $1.99 up front. Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. Design and Technology asks for nothing beyond the download.

Design and Technology ships an update every 4 months, Engineering Formulas every 2 months. The most recent releases landed on October 16, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Design and Technology | Engineering Formulas |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/design-and-technology/id363449581/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 115 MB | 45 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [J Plimmer](https://appshunter.io/developer/363449584) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### Design and Technology

[App page](https://appshunter.io/ios/app/design-and-technology/id363449581)

This app offers a comprehensive digital resource for students studying design and technology. It covers a wide range of topics, provides coursework guidance with examples, and includes revision quizzes to prepare for exams. Access key information on materials, processes, electronics, and more, all from your mobile device.

**Highlights:** Comprehensive topic coverage, Coursework guidance and examples, Revision quizzes with multiple-choice questions, Information on materials and processes, Electronics and circuit knowledge, Health and safety information

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

**In-app purchases:** none


### Engineering Formulas

[App page](https://appshunter.io/ios/app/engineering-formulas-engiref/id6758258119)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Yearly Premium | $29.99 | per year |
| Lifetime Access | $54.99 | one-time |


## Frequently asked questions

### Is Design and Technology free?

Design and Technology costs $1.99, with no in-app purchases.

### Is Engineering Formulas free?

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

### Do Design and Technology or Engineering Formulas have ads?

Neither Design and Technology nor Engineering Formulas shows ads.

### Which is updated more often, Design and Technology or Engineering Formulas?

Design and Technology ships an update every 4 months, and Engineering Formulas every 2 months. Most recently, Design and Technology was updated on October 16, 2026 and Engineering Formulas on October 4, 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.*