# Pocket Slide Rule Expert vs Trigonometry 360

The clearest difference is price: Trigonometry 360 at Free against Pocket Slide Rule Expert's $0.99. Trigonometry 360 also leads on update cadence (monthly vs every 4 months). Pocket Slide Rule Expert's advantage is iOS requirement (9.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

Trigonometry 360 is free to download; Pocket Slide Rule Expert costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pocket Slide Rule Expert ships an update every 4 months, Trigonometry 360 monthly. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Pocket Slide Rule Expert | Trigonometry 360 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/pocket-slide-rule-expert/id434331277/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | — |
| Size | 16 MB | 54 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TestTubeGames](https://appshunter.io/developer/421890276) | [Baran Polat](https://appshunter.io/developer/1775913614) |

## What reviewers say

### Pocket Slide Rule Expert

[App page](https://appshunter.io/ios/app/pocket-slide-rule-expert/id434331277)

Learn to use a classic slide rule with this app. It offers precise calculations and an "auto-slide-rule" mode to demonstrate operations. Save and reuse slider positions for frequent calculations.

**Highlights:** Classic slide rule simulation, Auto-slide-rule demonstration mode, Precise cursor and slider control, Save and reuse slider positions ('Snaps'), 19 basic operations supported, Multiplication, division, powers, logs, trig functions

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

**In-app purchases:** none


### Trigonometry 360

[App page](https://appshunter.io/ios/app/trigonometry-360/id6787418306)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pocket Slide Rule Expert free?

Pocket Slide Rule Expert costs $0.99, with no in-app purchases.

### Is Trigonometry 360 free?

Trigonometry 360 is free to download, with no in-app purchases.

### Do Pocket Slide Rule Expert or Trigonometry 360 have ads?

Neither Pocket Slide Rule Expert nor Trigonometry 360 shows ads.

### Which is updated more often, Pocket Slide Rule Expert or Trigonometry 360?

Pocket Slide Rule Expert ships an update every 4 months, and Trigonometry 360 monthly. Most recently, Pocket Slide Rule Expert was updated on October 29, 2026 and Trigonometry 360 on October 24, 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.*