Slide Rule vs eModulex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Slide Rule
Simulates a mechanical analog computer for scientific and engineering calculations. Perform multiplication, division, roots, and trigonometric functions with a digital slide rule.
- Multiplication and division
- Square and cube roots
- Trigonometry functions
- Logarithm calculations
- Digital slide rule simulation
- Mechanical analog computer
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This app is a slide rule simulator. The slide rule (a.k.a. slipstick) is an mechanical analog computer which was formerly used for various scientific calculations, engineering design and surveying. It consists of three linear strips and a sliding cursor and is used for multiplication, division, square, cube, square root, cubic root, trigonometry, logarithm and so on. Please note that trigonometry and logarithm are not supported and the width of the scale is 1,000 pixels in this version.
eModulex
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.
- 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
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Working on another time-consuming sign survey, audit or punch list? Get it done faster and more accurately and leave the cart, buggy, and clipboard behind. eModulex’s iOS app, your iPhone or iPad are all you need. Take pictures of signs, assign state and type, view messages, and add comments. Your data is captured as you go and immediately synced with your eModulex desktop. *Features* With the eModulex iPhone and iPad app, you can: Log in using your existing eModulex credentials and access your current projects. See the sign information from currently programmed floor plans and list view, including - sign state, sign type, location, number, quantity, messaging, artwork, and comments. Take pictures of existing signs. Pinch to zoom, move through the plan using your fingers, and rotate the plan 45 degrees at a time. Surveying and Auditing - tap and hold on the plan to add a new sign marker - take multiple pictures, add comments, and collect all necessary information. Manage sign tags - select, rotate and move signs within the plan. Share information back and forth - sync all of your project data with eModulex online - any changes can be synced back to the mobile device. Divide and Conquer - set up multiple mobile iOS devices on the same project to complete your survey even faster! Choose your workflow - pick whether to launch the camera when adding new signs or display messages with the artwork. Punch/Review - easily evaluate signs with approval and rejection actions within the app. Doing a large exterior or city-wide project? The eModulex app works with the mapping feature. *System Requirements* Requires iOS 12.0 or later. Compatible with iPhone 6 or later, iPad Air WiFi or later, and iPod touch.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Slide Rule | eModulex |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 1.0 (1 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 29 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 3 MB | 44 MB |
| Age rating | 4+ | 12+ |
| Developer | Masayuki Akamatsu | SignAgent Inc. |
Customer experience
Slide Rule
eModulex
In-app purchases
Slide Rule
No in-app purchases
eModulex
No in-app purchases









