Bolt Length vs BOX加工
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
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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.
BOX加工
This app calculates optimal hole sizes for boxes, preventing them from shifting to one side. It provides standard opening sizes for various gauges and allows for custom settings. Designed for precision in box construction.
- Calculates hole sizes to prevent box shifting
- Standard opening sizes for G16, G22, G28, G36
- Customizable opening size settings
- Precision tool for box construction
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BOXの片方に寄ってしまう事がないように計算します。 G16は22φ、G22は28φ、G28は34φ、G36は42φで開口します。 また、これらの値は設定で変更することが出来ます。
Screenshots
Verdict
The clearest difference is review sentiment: BOX加工 at 75% against Bolt Length's 33%. BOX加工 also leads on in-app purchases (none vs 1) and update cadence (every 5 months vs every 20 months). Bolt Length's advantage is iOS requirement (14.0 vs 18.0). On price, ads 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. BOX加工 asks for nothing beyond the download.
Bolt Length ships an update every 20 months, BOX加工 every 5 months. The most recent releases landed on August 2, 2026 and June 20, 2026 respectively.
| Parameter | Bolt Length | BOX加工 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 33.3% of reviews | 75.0% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Every 20 months | Every 5 months — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 6 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | mitsunori oishi | Takahiro Ikejima |
Customer experience
Bolt Length
BOX加工
In-app purchases
Bolt Length
- Hide Ads$1.99
BOX加工
No in-app purchases
