# Trigonometric Equations vs Digital Electronics Pro

The clearest difference is update cadence: Digital Electronics Pro at every 2 months against Trigonometric Equations's every 20 months. Trigonometric Equations's advantage is price ($0.99 vs $4.99) and iOS requirement (9.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

Trigonometric Equations costs $0.99 and Digital Electronics Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trigonometric Equations ships an update every 20 months, Digital Electronics Pro every 2 months. The most recent releases landed on October 8, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Trigonometric Equations | Digital Electronics Pro |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 2 months** |
| Size | 10 MB | 21 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [FadiSoft Inc.](https://appshunter.io/developer/721334526) | [ALG Software Lab SIA](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Trigonometric Equations

[App page](https://appshunter.io/ios/app/trigonometric-equations/id927622565)

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

**In-app purchases:** none


### Digital Electronics Pro

[App page](https://appshunter.io/ios/app/digital-electronics-pro/id6478407802)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometric Equations free?

Trigonometric Equations costs $0.99, with no in-app purchases.

### Is Digital Electronics Pro free?

Digital Electronics Pro costs $4.99, with no in-app purchases.

### Do Trigonometric Equations or Digital Electronics Pro have ads?

Neither Trigonometric Equations nor Digital Electronics Pro shows ads.

### Which is updated more often, Trigonometric Equations or Digital Electronics Pro?

Trigonometric Equations ships an update every 20 months, and Digital Electronics Pro every 2 months. Most recently, Trigonometric Equations was updated on October 8, 2026 and Digital Electronics Pro on October 12, 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.*