Bolt Length vs ThreadFon Multi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bolt Length
This application helps calculate the length of metric coarse screws based on Japanese Industrial Standards. It is designed for mechanical design purposes and should be used at the user's own risk.
- Metric coarse screw length calculation
- Conforms to Japanese Industrial Standards (JIS)
- Designed for mechanical design
- User risk disclaimer
Read full descriptionHide full description
This app is an application for calculating the length of the screw. ※:This app does not guarantee the effectiveness of the combination. ※:Use this application at your own risk. Conforms to the Japanese Industrial Standards (JIS). Screws are all metric coarse screw. For mechanical design. Sorry, Only in Japan.Because using the JIS.
ThreadFon Multi
This tool provides detailed insights into metric, inch, pipe, and trapezoidal cylindrical threads based on ISO and ASME standards. It helps users efficiently determine essential thread specifications for various thread types.
- ISO Metric thread support
- Unified Inch thread support
- Pipe thread support
- Trapezoidal thread support
- Based on ISO 965 and ASME B1.1 standards
- Determines fundamental thread parameters
Read full descriptionHide full description
This application now supports ISO Metric, Unified Inch, Pipe, and Trapezoidal Thread Tolerances, providing detailed insights into the fundamental parameters of metric, inch, pipe, and trapezoidal cylindrical threads. Built on the ISO 965 standard, ASME/ANSI B1.1 standard, ISO 228, ANSI/ASME B1.20.1, ГОСТ 6357-81, and GOST 24737-81 standard. Designed for precision and ease, this tool helps you efficiently determine essential thread specifications for metric, unified inch, pipe, and trapezoidal threads.
Screenshots
Verdict
The clearest difference is review sentiment: ThreadFon Multi at 80% against Bolt Length's 33%. ThreadFon Multi also leads on rating (3.8 vs 3.0) and in-app purchases (none vs 1). On price, ratings volume 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
Both are free to download. Bolt Length sells 1 one-off in-app purchase. ThreadFon Multi asks for nothing beyond the download.
ThreadFon Multi holds the better App Store score, 3.8 against 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 33% of Bolt Length's written reviews are positive against 80% of ThreadFon Multi's.
Bolt Length ships an update every 20 months, ThreadFon Multi monthly. The most recent releases landed on August 2, 2026 and September 9, 2026 respectively.
| Parameter | Bolt Length | ThreadFon Multi |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 3.8 (4 ratings) — better |
| Positive reviews | 33.3% of reviews | 80.0% of reviews — better |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 20 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | mitsunori oishi | Dmitriy Trofimov |
Customer experience
Bolt Length
ThreadFon Multi
In-app purchases
Bolt Length
- Hide Ads$1.99
ThreadFon Multi
No in-app purchases
Questions
Is Bolt Length free?
Is ThreadFon Multi free?
Which has better reviews, Bolt Length or ThreadFon Multi?
Do Bolt Length or ThreadFon Multi have ads?
Which is updated more often, Bolt Length or ThreadFon Multi?
Other comparisons
