Comparison

Control City vs Document GPS

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

Head to head
About

Control City

Features
Read full description

Control City is an automative general application specialize in Car-Product parts, software, Ecu files, in addition to Key and pin codes of all car- Brands in a premium user interface and easy to use options to achieve the optimal user experience and produce a high quality service to all users all over the world

About

Document GPS

Securely send and track email attachments with blockchain-based encryption. Control access, revoke permissions, and monitor all user activity in real-time. Offers a private library for recipients to upload encrypted files.

Highlights
  • Blockchain-based security
  • Real-time access tracking
  • Revoke download/share permissions
  • Encrypted file sending/receiving
  • Private recipient library
  • Timestamped activity log
Features
Read full description

Desktop and free Mobile app seamlessly link together so you can track your files on the go. Revoke access from your phone or laptop at any time. Sign up for a 30-day free trial (no credit card required for sign up) via the desktop extension. Japanese and Spanish versions also available on desktop. Track, modify and delete already sent attachments using blockchain-based security. NO need to jump to other platforms to manage your files. - Completely control who can/cannot download, share or access your email attachments, at all times. You can always give or revoke the permission to any recipients to access, download, or share your email attachments. Regardless of who has a copy of your email with your Document GPS attachment, they cannot download, share and access the attachment unless you allow them to. Our system is blockchain-secure, protecting your attachments fully. Never worry again about who sees your files. –Now you can SEND and RECEIVE encrypted attachments. Your recipients can access their Private Library where they can securely upload files with immediate tokenization and encryption. Only you and your recipients can access the Library. Great for healthcare providers, accountants, attorneys, researchers, financial advisors and more. Anyone who needs to have files sent to them in a secure and encrypted platform can benefit from Document GPS. Show your clients you protect their digital privacy from the very first step all the way through the entire process. - Near carbon-free email: prevent attachments from being downloaded or shared when they don't need to be. Do your part by sending "green" attachments for a low carbon email account with Document GPS. - See everything that goes on, in real-time. A timestamped log comes with each document (hence, Document GPS), showing every time each individual user views, shares, downloads, or changes anyone’s permissions on it, in real-time. It shows exactly how many times each user has viewed it. Never worry again about not knowing who sees your files. - Rest easy, with Document GPS’s blockchain security. - All files sent using Document GPS are encrypted, even if the email itself is not, so they are protected from AI scanning the text. - All users have direct and indirect analytics. - Manage your documents without difficulty. --1-Button software gives others a way to interact with you and anyone you invite into your files. --1-Link technology lets you access all the features but with a shareable link you can send to your colleagues or other collaborators. - Within your document workbench is an Email Attachment Library: a list of all the documents you own or have access to. From here, you can monitor and manage your documents and their recipients effortlessly. - All major file types are supported. - There is no limit to the number of attachments you can attach. - Coming soon: users will be able to edit documents using Document GPS - Document GPS uses ShelterZoom's Single Source Of Truth® software technology to create immutable records for sharing of files, communication, collaboration, and permanent record keeping. --See how many times someone has opened your attachments, giving you greater insights into their level of interest in your materials. Great for marketing analytics and budget decisions. --The mobile app lets you take a photo using the app and the picture is NOT stored on your device, providing you greater privacy. --SSOT® security is state of the art

Screenshots

Control City4 screens
Document GPS4 screens

Verdict

The call

The clearest difference is update cadence: Control City at every 9 days against Document GPS's every 2 months. Control City also leads on iOS requirement (13.0 vs 15.1). 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

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

Control City ships an update every 9 days, Document GPS every 2 months. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

Scorecard2 real differences · 7 level
Control City versus Document GPS: the parameters behind the verdict, then further details
ParameterControl CityDocument GPS
PriceFreeFree
Rating—4.8 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 9 days — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size41 MB87 MB
Age rating4+17+
DeveloperRoqayShelterZoom Corp

In-app purchases

None

Control City

No in-app purchases

None

Document GPS

No in-app purchases

Questions

Is Control City free?
Control City is free to download, with no in-app purchases.
Is Document GPS free?
Document GPS is free to download, with no in-app purchases.
Do Control City or Document GPS have ads?
Neither Control City nor Document GPS shows ads.
Which is updated more often, Control City or Document GPS?
Control City ships an update every 9 days, and Document GPS every 2 months. Most recently, Control City was updated on September 29, 2026 and Document GPS on October 2, 2026.

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