SMWLU 27 vs Proof TAB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SMWLU 27
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The official mobile app for the Sheet Metal Workers Local 27. Features include: - Home - Label It / Scan It - Shop Stewards - Training - Officers & Staff - Local 27 Contractors - Contact Us - News Feeds - Boycotts - Important Links - Push Notifications MEMBERS ONLY can view: - Member Home - Push Notification Archive - Events Calendar - Downloads - Funds - Photo Gallery
Proof TAB
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Proof helps field technicians and engineers perform Testing, Adjusting and Balancing (TAB) and Commissioning (Cx) work more efficiently, accurately, and professionally on site. Built to work seamlessly with its desktop companion, the app enables iPhone users to capture data in the field and sync it automatically to the desktop for streamlined review, reporting, and project coordination. Designed around real site needs and aligned with international standards, Proof supports a wide range of workflows, including: Packaged Units Air Handling Units (AHUs) Fresh Air AHUs Chillers and hydronic water systems Customizable forms Checklists Issue logs Site observations With Proof, teams can reduce paperwork, improve consistency, and deliver clearer, faster, and more reliable TAB and Cx documentation from site to office. A slightly more breakthrough marketing version: Proof transforms how TAB and Commissioning teams work on site. It gives technicians and engineers a faster, smarter way to collect, manage, and synchronize field data while working in full coordination with the desktop platform. Data captured on iPhone is automatically synced, helping teams move seamlessly from field execution to office review and final reporting. Developed to meet real project-site demands and support internationally recognized workflows, Proof covers key equipment and processes such as Packaged Units, AHUs, Fresh Air AHUs, chillers, water systems, custom forms, checklists, issue tracking, and site observations. From field data capture to final documentation, Proof helps deliver better accuracy, stronger consistency, and a more professional TAB and Cx process.
Screenshots
Verdict
The clearest difference is update cadence: Proof TAB at every 8 days against SMWLU 27's every 56 months. 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.
SMWLU 27 ships an update every 56 months, Proof TAB every 8 days. The most recent releases landed on October 4, 2026 and September 19, 2026 respectively.
| Parameter | SMWLU 27 | Proof TAB |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 56 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 3 MB | 935 MB |
| Age rating | 17+ | 4+ |
| Developer | Unions-America.com, Inc. | Jawad Jaber |
In-app purchases
SMWLU 27
No in-app purchases
Proof TAB
No in-app purchases
Questions
Is SMWLU 27 free?
Is Proof TAB free?
Do SMWLU 27 or Proof TAB have ads?
Which is updated more often, SMWLU 27 or Proof TAB?
Other comparisons
