J vs Bolt Calculation & Analysis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
J
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J-Weld is a mobile APP which is used to remote welding machines.
Bolt Calculation & Analysis
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Analyze the strength of fasteners in seconds with the Bolt Analysis App, developed specifically for engineers and technical teams. Easily perform calculations for stress, shear force, torque, tightening force, and safety factors. Key Features: - Fast Bolt Strength Calculations: Instant and accurate results. - Metric & Imperial Support: Complete flexibility for global standards. - Material & Grade Selection: Wide range of material and quality class options. - Torque & Preload Analysis: Advanced calculation tools for secure joints. - User-Friendly Engineering Interface: Clean, intuitive, and practical design. - On-Site & Production Ready: Instant use directly on the field or manufacturing floor. A professional analysis tool tailored for the machinery, automotive, defense, aerospace, and manufacturing industries.
Screenshots
Verdict
The clearest difference is update cadence: Bolt Calculation & Analysis at every 3 weeks against J's every 3 months. J's advantage is iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
J ships an update every 3 months, Bolt Calculation & Analysis every 3 weeks. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.
| Parameter | J | Bolt Calculation & Analysis |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 30 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 深圳市佳士科技股份有限公司 | KORAY GULPINAR |
In-app purchases
J
No in-app purchases
Bolt Calculation & Analysis
No in-app purchases
Questions
Is J free?
Is Bolt Calculation & Analysis free?
Do J or Bolt Calculation & Analysis have ads?
Which is updated more often, J or Bolt Calculation & Analysis?
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