4.2P SP vs Sheet Metal Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4.2P SP
Read full descriptionHide full description
4.2P SP是4.2P SP音箱配套的蓝牙遥控应用，旨在让用户方便地使用4.2P SP音箱，并解锁音箱更多的高阶设置。 主要功能： 1 调整音量。 2 选择输入通道。 3 设置唱机通道为MM/MC输入，并可以选择通道的输入阻抗。 4 显示音箱的状态信息。 5 设置低音信号输出的截止频率以及增益。 6 设置低音喇叭的增益。 7 设置等响度功能。 8 分别设置高中低音3段EQ的频率，Q值以及增益。
Sheet Metal Master
Read full descriptionHide full description
Sheet Metal Master is an on-device calculation tool for duct fabrication, pipe fitting, and sheet-metal layout. Enter measurable dimensions to preview patterns, define fabrication allowances, save projects, and export DXF files. 15 TASKS • Ductwork: round-to-rectangle, rectangular reducer, 90° round tee, rectangular offset, rectangular miter elbow, and rectangular tee • Pipe and vessel work: oblique round tee, equal-diameter round Y branch, segmented elbow, cone/frustum, oblique-cut pipe, and spherical-head gores • Bending: single bend, double bend, and box bend WORKFLOW • Live result and flat-pattern previews • Welding, riveting, lock-seam, and manual allowances • Save, reopen, and update local projects • Share calculation summaries • Export millimeter-based ASCII R12 DXF files Core calculations run locally on your device. The round Y branch is a field-fit construction. A sphere cannot be flattened without strain, so spherical-head gores are an approximation with a reported boundary-strain value. Always verify material, connection details, and a sample before production cutting. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: 4.2P SP at none against Sheet Metal Master's 1. 4.2P SP also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (13.0 vs 17.0). 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. Sheet Metal Master sells 1 in-app purchase, starting at $4.99 per month. 4.2P SP asks for nothing beyond the download.
4.2P SP ships an update every 2 months, Sheet Metal Master every 5 months. The most recent releases landed on October 7, 2026 and September 23, 2026 respectively.
| Parameter | 4.2P SP | Sheet Metal Master |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | 健雏 何 | 磊 高 |
In-app purchases
4.2P SP
No in-app purchases
Sheet Metal Master
- SheetMetal Master$4.991 Month
