EMCO vs i
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EMCO
Read full descriptionHide full description
The EMCO-TEST app includes helpful tools regardless of your hardness testing machine! This app offers the following tools: •Hardness conversion •Diagonal conversion •Maximum error of hardness testing machine •Rockwell and Vickers corrections •Lens selection •Hardness Know-How Hardness conversion: With this tool you can quickly and easily revalue between Rockwell, Vickers, Brinell, Knoop and depth test methods. Maximum error of hardness testing machine: Determine quickly and easily the maximum error of the entered hardness of the test block. In the indirect verification of the hardness testing machine with the test block the permissible limits shall not be exceeded. Rockwell and Vickers corrections: Get your correction value for Rockwell or correction factor for Vickers when you are testing on curved surfaces. Lens selection: Find the right lens for your required hardness testing methods. Hardness Know-How: Find everything about the basic principles of hardness testing (Rockwell, Brinell, Vickers, Knoop as well as other test methods such as carbon, plastic and Leeb testing). According to Standards: ASTM E140 ASTM E18 ASTM E384, E92 ASTM E10 EN ISO 18265 EN ISO 6508 EN ISO 6507 EN ISO 6506 EN ISO 4545
i
This utility app assists machinists with CNC calculations, including cutting speed, RPM, and feed rate. It also provides databases for hole and shaft tolerances, as well as detailed thread specifications.
- Cutting speed calculation
- RPM calculation
- Feed rate calculation
- Hole and shaft tolerance database
- Thread data
- Milling, drilling, and turning operations
Read full descriptionHide full description
iMachinist is a simple to use CNC calculator app that calculates for you the cuttings speed, RPM, feed rate and more for your milling, drilling and turning operations. iMachinist also includes a database for Hole and Shaft Tolerances and different Threads. Threads Data: - Outer Diameter (max/min) - Pitch Diameter (max/min) - Core Diameter (max/min) - Thread Height (max/min) Tolerance Data: - Zone (Shaft/Hole) - Grade (Shaft/Hole) - Diameter (Shaft/Hole) Cutting Calculator: - Tool Diameter - Cutting Speed - Spindle Speed - Number of Teeth - Feed per Tooth - Feed Rate
Screenshots
Verdict
The clearest difference is update cadence: EMCO at every 3 months against i's every 13 months. EMCO also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EMCO ships an update every 3 months, i every 13 months. The most recent releases landed on May 28, 2026 and October 3, 2026 respectively.
| Parameter | EMCO | i |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.6 (9 ratings) — better |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | — | 9 — better |
| Update frequency | Every 3 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 11 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | EMCO-TEST Prüfmaschinen GmbH | ilan TETRUASHVILI |
In-app purchases
EMCO
No in-app purchases
i
No in-app purchases
