Comparison

Zetta GPS vs ProStamp

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Zetta GPS

Read full description

Cam Server for image uploaded from the camera and get push notification

About

ProStamp

This professional camera app automatically stamps photos and videos with essential job details like time, GPS, and weather. It creates verifiable proof of work with customizable watermarks and a built-in gallery for easy organization and sharing.

Highlights
  • Auto-stamp photos with time, GPS, and weather
  • Network-verified time for proof
  • Customizable watermarks with company logo
  • Built-in gallery with photo map
  • Batch sharing and PDF reports
  • Offline functionality with GPS
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PHOTO PROOF, JOB CHECKLISTS AND INVOICES IN ONE CAMERA ProStamp is the timestamp camera built for cleaners, contractors, inspectors, property managers and field service teams. Every photo carries the time, GPS location, street address and your logo. Every job has a checklist, Before & After photos and a Completion Report. When the work is done, the invoice is one tap away. No account needed. Open the app and shoot. CAPTURE PROOF THAT HOLDS UP • Timestamp, GPS coordinates and street address on every photo and video • Weather, compass direction and a map thumbnail • Network-verified timestamps with a trust badge on each photo • Your company name and logo, with a live watermark preview • Photo and video, multiple aspect ratios, zoom, grid and level • Take photos while recording video • Big touch targets that work with gloves on RUN THE JOB FROM START TO FINISH • Create a Job for each visit with the client and address • Reusable checklist templates, grouped by room • Shoot Before, After and supporting photos straight from the checklist • A badge on the camera shows what is due today • Reminders before scheduled jobs • Duplicate a job for a repeat client, or reopen one if something was missed GET PAID • Create an invoice from a completed job by typing one amount • Send the invoice alone, or with the Completion Report and its photos as one PDF • Invoice Center shows what is unpaid and what is overdue • Mark an invoice paid on the spot DELIVER PROOF CLIENTS TRUST • Professional PDF Completion Reports with your branding • On-site signature, or a secure acknowledgment link that needs no app • Signed evidence data embedded in supported photos and videos • Verification tools show whether a photo still matches its original • Markup and redaction, including copies with the location removed GALLERY AND TOOLS • Browse by date, address, profile or map • Compare two photos side by side • Batch sharing and ZIP export • Document Scanner, Room Scan, Voice Site Notes, Quick Field Reports and map exports PROSTAMP PRO The free plan includes the camera, the gallery and your first Job. Pro unlocks: • Unlimited jobs and custom checklist templates • Remote client acknowledgment links • Automatic backup to your own Google Drive or OneDrive • Remove the ProStamp watermark • Up to 10 profiles and unlimited batch exports • Map exports, Room Scan, multi-page scans and Quick Field Reports • Restore purchases across supported devices TEAM WORKSPACE Invite employees into a private workspace: jobs organized by company and project, a team destination chosen before you shoot, reliable background uploads and a manager web portal. Members get Pro features while connected. Available by invitation through participating organizations. PRIVACY FIRST Photos are processed on your device. Personal backups go straight to your own cloud drive. You decide whether media stays on the phone, in your storage or in a company workspace. Built for cleaners, contractors, inspectors, restoration crews, property managers, maintenance teams, technicians, pest control, pressure washing and pool service. Terms of Use: https://prostamp.app/terms/ Privacy Policy: https://prostamp.app/privacy/

Screenshots

Zetta GPS4 screens
ProStamp4 screens

Verdict

The call

The clearest difference is update cadence: ProStamp at every 3 days against Zetta GPS's every 5 weeks. Zetta GPS's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Zetta GPS ships an update every 5 weeks, ProStamp every 3 days. The most recent releases landed on September 17, 2026 and September 9, 2026 respectively.

Scorecard3 real differences · 7 level
Zetta GPS versus ProStamp: the parameters behind the verdict, then further details
ParameterZetta GPSProStamp
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 5 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.6
Further details — not scored
Size46 MB20 MB
Age rating4+4+
DeveloperZetta Systems LimitedXiao Lang

In-app purchases

None

Zetta GPS

No in-app purchases

None

ProStamp

No in-app purchases

Questions

Is Zetta GPS free?
Zetta GPS is free to download, with no in-app purchases.
Is ProStamp free?
ProStamp is free to download, with no in-app purchases.
Do Zetta GPS or ProStamp have ads?
Neither Zetta GPS nor ProStamp shows ads.
Which is updated more often, Zetta GPS or ProStamp?
Zetta GPS ships an update every 5 weeks, and ProStamp every 3 days. Most recently, Zetta GPS was updated on September 17, 2026 and ProStamp on September 9, 2026.

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