# Slide Rule vs eModulex

The clearest difference is price: eModulex at Free against Slide Rule's $0.99. eModulex also leads on rating (5.0 vs 1.0) and update cadence (every 9 months vs every 29 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

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

eModulex holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Slide Rule ships an update every 29 months, eModulex every 9 months. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Slide Rule | eModulex |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/slide-rule/id288454455/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/emodulex/id6443797534/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 9 months** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 44 MB |
| Requires iOS | 17.0 | **12.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [SignAgent Inc.](https://appshunter.io/developer/1055537348) |

## What reviewers say

### Slide Rule

[App page](https://appshunter.io/ios/app/slide-rule/id288454455)

Simulates a mechanical analog computer for scientific and engineering calculations. Perform multiplication, division, roots, and trigonometric functions with a digital slide rule.

**Highlights:** Multiplication and division, Square and cube roots, Trigonometry functions, Logarithm calculations, Digital slide rule simulation, Mechanical analog computer

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

**In-app purchases:** none


### eModulex

[App page](https://appshunter.io/ios/app/emodulex/id6443797534)

Streamline sign surveys, audits, and punch lists with this mobile tool. Capture sign details, take photos, and manage information directly from your iPhone or iPad. Sync data instantly with the desktop version for efficient project management.

**Highlights:** Sign survey and audit management, Photo capture for signs, Real-time data syncing, Interactive floor plan navigation, Sign tag management, Collaborative project setup, Punch/review actions

**In-app purchases:** none


## Frequently asked questions

### Is Slide Rule free?

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

### Is eModulex free?

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

### Which has better reviews, Slide Rule or eModulex?

eModulex is rated higher. Slide Rule averages 1.0 out of 5 from 1 ratings, while eModulex averages 5.0 from 2 ratings.

### Do Slide Rule or eModulex have ads?

Neither Slide Rule nor eModulex shows ads.

### Which is updated more often, Slide Rule or eModulex?

Slide Rule ships an update every 29 months, and eModulex every 9 months. Most recently, Slide Rule was updated on September 21, 2026 and eModulex on September 10, 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.*