i vs Bolt Thread Identifier
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Bolt Thread Identifier
Identify bolt thread pitches by taking a photo. This app uses AI to match SAE-UNC, SAE-UNF, or metric pitches after a simple distance calibration. It's a handy tool for anyone working with fasteners.
- Photo-based thread pitch measurement
- AI-driven pitch matching
- Supports SAE-UNC, SAE-UNF, and metric threads
- Simple distance calibration
- Useful for fabricators and mechanics
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Measure the thread pitch of common bolts by snapping a photo and performing a simple distance calibration. Custom AI algorithms will then return the matching SAE-UNC, SAE-UNF, or metric pitches. Fabricators, mechanics, home owners, and hobbyists in general will find the Bolt Thread Identifier App a useful addition to their tool box.
Screenshots
Verdict
The clearest difference is rating: i at 2.6 against Bolt Thread Identifier's 2.3. i also leads on ratings volume (9 vs 3) and iOS requirement (16.0 vs 26.0). On price, review sentiment, update cadence and ads 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.
i holds the better App Store score, 2.6 against 2.3. Both are backed by a comparable volume of ratings — 9 and 3 respectively. Written reviews split almost evenly too, at 33% and 33% positive.
i ships an update every 16 months, Bolt Thread Identifier every 11 months. The most recent releases landed on September 16, 2026 and September 20, 2026 respectively.
| Parameter | i | Bolt Thread Identifier |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (9 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 33.3% of reviews | 33.3% of reviews |
| Number of ratings | 9 — better | 3 |
| Update frequency | Every 16 months | Every 11 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 8 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | ilan TETRUASHVILI | Geared Design Consulting L.L.C. |
Customer experience
i
Bolt Thread Identifier
In-app purchases
i
No in-app purchases
Bolt Thread Identifier
No in-app purchases
Questions
Is i free?
Is Bolt Thread Identifier free?
Which has better reviews, i or Bolt Thread Identifier?
Do i or Bolt Thread Identifier have ads?
Which is updated more often, i or Bolt Thread Identifier?
Other comparisons
