# Mastlens — One-click tower closeouts > One-click tower closeouts (iPhone/iPad app by Checksum Works LLC.) - Source: https://appshunter.io/ios/app/mastlens/id6786859010 (this page in markdown: same URL + `.md`) - Developer: [Checksum Works LLC](https://appshunter.io/developer/6778569000) - Category: Business, Productivity - Price: Free - Age rating: 4+ - Requires: iOS 15.1 · 48 MB - Languages: American English - Released: 2026-07-09 - Data updated: 2026-09-15 - User reviews in markdown: https://appshunter.io/ios/app/mastlens/id6786859010/reviews.md ## What is Mastlens? Capture GPS and time-stamped job-site photos, run structured checklists, and keep tower closeout documentation moving — even where there's no signal. Description Mastlens is the field documentation app for telecom tower crews. Capture the proof your closeout package needs — right at the site, even with zero signal — and let the paperwork build itself while you work. BUILT FOR TOWER WORK • Every photo is automatically stamped with GPS coordinates and time, so your documentation holds up • Structured checklists mirror your company's closeout requirements — no more guessing which shots are missing • See exactly what's done and what's left before you leave the site, and skip the costly return trips WORKS OFFLINE Tower sites rarely have good coverage. Mastlens stores photos and checklist progress on the device and syncs automatically when you're back in range. FROM SITE TO CLOSEOUT Everything you capture syncs to the Mastlens platform, where your back office assembles polished, client-ready closeout packages — organized by project, checklist, and section. FOR TEAMS • Projects and checklists assigned to your crew show up ready to work • Managers see field progress as it syncs • Role-based access keeps everyone in their lane Mastlens is built for telecom tower installation and maintenance companies. An account provided by your company is required to sign in — ask your Mastlens administrator for an invitation. ## Version history (last 5 releases) ### 1.0.7 — 2026-09-13 REQUIRED CERTIFICATIONS Tell Mastlens which credentials your crews have to hold, and this release shows you exactly where everyone stands. - Certifications now opens on a Required tab for admins and managers: one card per crew member, every credential your company requires, and where they stand on each one. Whoever is short comes first, so you are not scrolling an alphabet to find them. - Each card spells out the dates - what has lapsed, what is expiring, and what was never on file at all. - Tap a credential somebody holds to open the actual certificate. - Anyone excused from a credential shows as "Not tracked", with the reason underneath. - A project's crew certifications now flag anyone missing a required credential, not only the ones whose certificates have lapsed, and name what each person is short of. Choosing which credentials are required, and excusing people from them, is done in the web app. PROJECTS - A new "Initiated" status, for a site that is set up but not yet being worked. It shows in yellow on the projects list, so a job waiting to start is no longer indistinguishable from one your crew is on today. - Pick the status when you create the project - New Project now has a Status row, and Initiated joins the buttons on Edit Project. - The Projects tab now opens on Active instead of All, so completed and archived jobs stay out of the list you work from on site. Every other filter, All included, is one tap away. ALSO IN THIS RELEASE - Closeout packages and JHA packets now carry a one-line credit to Mastlens, since both routinely land with a GC or a carrier safety rep. A company admin can switch it off in the web app under Settings > Documents. ### 1.0.6 — 2026-08-29 Certifications beyond Safety LMS • CPR cards, OSHA cards and any other certificates your company has uploaded now appear in the app alongside the ones synced from Safety LMS, with the same expiry marks. Uploading and approving stay on the web app. • A new filter at the top of Certifications switches between All sources, Safety LMS and Other, so you can look at one feed at a time. • Search your crew's certifications by name, email address or certificate number — useful when you are standing at the gate confirming that one person is current. Marking a field complete is now your call • Taking a photo no longer completes the field. It stays grey until you tap the circle, so "done" means somebody actually checked it. Tap again to un-mark. • Works with no signal: the tap sticks immediately and syncs when you are back on, in the right order behind any photos still uploading. Camera • Pinch-to-zoom actually works. Any pinch used to shoot straight to maximum or minimum zoom, which made it useless for framing a shot. The zoom now follows your fingers, the × you are on shows while you pinch, and releasing near 0.5×, 1× or 3× snaps to it. • Turn the shutter sound and the camera haptics off, under Settings → Capture. Both are on by default. The shutter sound is a request rather than a guarantee — iOS and some jurisdictions force it at the system level. Fix your name from the app • Tap the pencil beside your name on Profile to change your first and last name, and admins can correct anyone's the same way from that person's page under More → Users. This one needs a signal — unlike photos and field sign-offs, a name change is not queued for later. ### 1.0.5 — 2026-08-19 Safety LMS certifications are here. If your company trains with Safety LMS / Comtrain, your certifications now sync into Mastlens automatically and show up in the app — no more digging through paperwork to prove you're current. YOUR CERTIFICATIONS, ON YOUR PROFILE Open Profile and tap My Certifications to see everything you hold, what's expiring, and what's already lapsed. Check you're covered before you go up, not after. VIEW THE ACTUAL CERTIFICATE Tap View certificate and the scan opens right inside the app. Pinch to zoom to read the certificate number and dates. It no longer sends you out to the browser and makes you sign in again to come back. CREW CERTIFICATIONS FOR A PROJECT Under a project's Safety menu, see everyone assigned to that job and whether they're current — including anyone with nothing on file at all. Know before the crew leaves the yard. AT-A-GLANCE WARNINGS The Certifications menu now carries an exclamation mark when something needs attention: amber for expiring soon, red as soon as anything has actually expired. FOR ADMINS AND MANAGERS • Correct a certificate matched to the wrong person, from that person's screen under Users. The fix sticks through future syncs. • An Unclaimed tab collects certificates that match nobody at your company — usually a subcontractor, or someone who trained under a different email address. • The company-wide roster now loads everyone as you scroll, instead of stopping short. ALSO IN THIS RELEASE • Certifications that never expire now say "No expiry" instead of showing a blank date. • Long certification lists load fully as you scroll. ### 1.0.4 — 2026-08-08 Photo markup • Open any photo, tap More then Edit, and mark it up on a full-screen canvas: draw freehand, add arrows, boxes, circles and text labels, crop, rotate, and adjust brightness, contrast and saturation. Point at the loose bolt instead of describing where it is. • Annotate a shot before it has even uploaded. Mark up a photo you just took at the tower and it saves straight away — the original uploads first, the annotated version follows, and your edit shows in the viewer whether or not you have signal. • Editing never touches the original, and edits stay editable. Every arrow and label comes back as a movable object with the sliders where you left them, so you can adjust an annotation instead of redrawing it. Markup made on the phone opens on the web app and vice versa. • Photo actions — Edit, Save to Photos, Accept, Reject and Delete — now live in a More menu with full-width rows, so Delete is no longer a fingertip away from Save to Photos. Photo rejection • Admins and managers can reject a photo: open it, tap Reject and write why. The crew sees the reason, so they know what to re-shoot. • Rejected photos are marked REJECTED with a red border, and Accept undoes a rejection made by mistake. • A field holding a rejected photo turns red with an X instead of a green tick and stops counting toward the checklist percentage, so progress reflects work that is actually usable. Shared rope library • Ropes are now shared across projects. Your company keeps one rope registry, so a rope you log once can be used on every job it travels to. • Add rope opens a picker of the ropes you already own — tick the ones going out on this job, or create a new one. Search by serial number or manufacturer to narrow the list. • Each project keeps its own inspection log, so a shared rope shows only the inspections carried out on the project you are viewing. • Removing a rope from a project keeps it in your library with its history intact. Admins and managers get a separate Delete Forever for retiring a rope company-wide. Also in this release • Press either volume button to take a photo — easier to hit one-handed in gloves than the on-screen shutter, and it works in batch capture too. Requires iOS 17.2 or later; the on-screen shutter is unchanged. • The projects list now shows each project's completion bar, matching the web app, and flags any project holding rejected photos. • Rope and inspection-log actions moved into a More menu instead of a row of icons. • Fixed: the on-screen keyboard no longer covers the buttons in dialogs that ask you to type something, such as renaming a cloned checklist or confirming a project deletion. ### 1.0.3 — 2026-08-03 - Sign the JHA on your phone The Sign-Off section now takes a real signature. Tap to open a full-screen signing pad, sign with your finger, and it prints on the generated JHA PDF — no more printing the form just to sign it. Re-sign or clear at any time before you save. - Rescue plan PDFs Download the rescue plan straight from the plan screen and share or save it — the PDF includes the site details, rescue methods, numbered steps, and who on the crew has acknowledged it. - Safety paperwork in closeout packages Closeout packages generated by your office now include a Safety Documents folder, so the rescue plan, PFAS harness checklists, and rope inspection logs you fill in on site travel with the job as PDFs alongside the photos. ## Apps similar to Mastlens | App | Rating | Price | Category | | --- | --- | --- | --- | | [Rigsnapper](https://appshunter.io/ios/app/rigsnapper/id6744887901) | — | Free | Business | | [Vertical Bridge - Site Locator](https://appshunter.io/ios/app/vertical-bridge-site-locator/id1593279244) | 5.0 (3) | Free | Business | | [Invoice maker App: InvoiceNano](https://appshunter.io/ios/app/invoice-maker-app-invoicenano/id6760932332) | — | Free | Business | | [Swift Projects](https://appshunter.io/ios/app/swift-projects/id1088762177) | 1.8 (30) | Free | Business | | [Pathwave](https://appshunter.io/ios/app/pathwave/id1434629853) | 4.0 (35) | Free | Business | | [LegalZoom](https://appshunter.io/ios/app/legalzoom/id6760735891) | — | Free | Business | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-15.*