Bolt Length vs MultiProtector
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.
MultiProtector
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The MultiProtector app now makes monitoring, evaluating and protecting your pump even easier and more efficient. The app offers the following functions: - Read data directly from the MultiProtector device. This gives you access to the fault memory/counter, allows you to assess the current status of the pump and view the operating data. - Create a report in PDF format in no time and forward it directly to your customers if needed or use it for your own documentation. Additional functions (does not require a gateway): - Retrieve the data sheets for the installed NETSZCH MultiProtector, so that they are available quickly and paperless during maintenance and repair work in the plant. - Analyze the status of the pump via the LED blink code, set the blink code and get the current error displayed directly
Screenshots
Verdict
The clearest difference is in-app purchases: MultiProtector at none against Bolt Length's 1. MultiProtector also leads on ads (none vs shown) and update cadence (every 6 months vs every 20 months). On price 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. MultiProtector asks for nothing beyond the download.
Bolt Length ships an update every 20 months, MultiProtector every 6 months. Both last shipped on October 8, 2026.
| Parameter | Bolt Length | MultiProtector |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 20 months | Every 6 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 12.2 — better |
| Further details — not scored | ||
| Size | 6 MB | 151 MB |
| Age rating | 4+ | 4+ |
| Developer | mitsunori oishi | NETZSCH Pumpen & Systeme GmbH |
In-app purchases
Bolt Length
- Hide Ads$1.99
MultiProtector
No in-app purchases
