Optimising vs i
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Optimising
This utility helps optimize the performance of rotary cutting tools like drills, taps, milling cutters, and reamers. It provides assistance to enhance the efficiency of these tools in various applications.
- Optimize rotary cutting tool performance
- Assists with drills, taps, milling cutters, reamers
- Enhances tool efficiency
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Optimising from Guhring is designed to assist you to optimise the performance of rotary cutting tools such as drills, taps, milling cutters and reamers.
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
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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
Optimising and i both sit at 2.8 stars, but that hides the real split: 63% of Optimising's written reviews are positive against 33% of i's. Optimising also leads on iOS requirement (9.0 vs 16.0). On price, rating, ratings volume and update cadence 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.
Optimising holds the better App Store score, 2.8 against 2.6. Both are backed by a comparable volume of ratings — 4 and 9 respectively. Written reviews point the same way: 63% of Optimising's written reviews are positive against 33% of i's.
Optimising ships an update every 8 months, i every 13 months. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.
| Parameter | Optimising | i |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (4 ratings) — better | 2.6 (9 ratings) |
| Positive reviews | 62.5% of reviews — better | 33.3% of reviews |
| Number of ratings | 4 | 9 — better |
| Update frequency | Every 8 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 8 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Guhring Pty. Ltd. | ilan TETRUASHVILI |
Customer experience
Optimising
i
In-app purchases
Optimising
No in-app purchases
i
No in-app purchases
Questions
Is Optimising free?
Is i free?
Which has better reviews, Optimising or i?
Do Optimising or i have ads?
Which is updated more often, Optimising or i?
Other comparisons
