# Optimising vs i

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.

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.

## The numbers

| Metric | Optimising | i |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (4 ratings)](https://appshunter.io/ios/app/optimising/id868624456/reviews)** | [2.6 (9 ratings)](https://appshunter.io/ios/app/i-machinist/id1456473668/reviews) |
| Number of ratings | 4 | **9** |
| Positive reviews | **62.5% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 13 months |
| Monetization | Free | Free |
| Size | 8 MB | 8 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Guhring Pty. Ltd.](https://appshunter.io/developer/868624459) | [ilan TETRUASHVILI](https://appshunter.io/developer/940821251) |

## What reviewers say

### Optimising

[App page](https://appshunter.io/ios/app/optimising/id868624456)

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.

**Highlights:** Optimize rotary cutting tool performance, Assists with drills, taps, milling cutters, reamers, Enhances tool efficiency

**Features:** macOS Compatibility

**In-app purchases:** none


### i

[App page](https://appshunter.io/ios/app/i-machinist/id1456473668)

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.

**Highlights:** Cutting speed calculation, RPM calculation, Feed rate calculation, Hole and shaft tolerance database, Thread data, Milling, drilling, and turning operations

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

**In-app purchases:** none


## Frequently asked questions

### Is Optimising free?

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

### Is i free?

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

### Which has better reviews, Optimising or i?

Optimising is rated higher. Optimising averages 2.8 out of 5 from 4 ratings, while i averages 2.6 from 9 ratings.

### Do Optimising or i have ads?

Neither Optimising nor i shows ads.

### Which is updated more often, Optimising or i?

Optimising ships an update every 8 months, and i every 13 months. Most recently, Optimising was updated on October 12, 2026 and i on October 3, 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.*