KleinMobile vs CircleBack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KleinMobile
This app allows marine pilots and shipping agencies to manage assigned jobs, receive private messages from port authorities, and access public port information. It includes an alarm function for upcoming tasks and web-based information access.
- Manage pilot jobs
- Receive private port messages
- Task alarm function
- Access public port information
- Web information access
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Newest member to the PortControl product line. If you are a marine pilot or shipping agency, With this app, you can: 1. Check the private message Port sends to you 2. Manage the pilot job that assigned to you 3. Using the build-in alarm function to remind you upcoming task 4. Check public information published by Port 5. Access information published on web **** IMPORTANT NOTES **** a. This app can only work with a port authority which has latest KleinPort product installed b. Before use the app, please contact the port authority you want to connect to directly to register a new user account. c. You will need to agree with the privacy policy defined by the port authority you want to connect to before your account can be created.
CircleBack
This app intelligently updates your contacts, finds new ones from email, and cleans duplicates. It also allows scanning business cards and offers unified contact management across devices.
- Automatic contact updates
- Duplicate contact merging
- New contact discovery from emails
- Business card scanning
- Unified address book
- Contact sync across devices
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CircleBack is the only address book manager that updates your contacts intelligently, discovers new contacts in your Google and Microsoft inboxes, cleans up duplicates, and allows you to scan business cards and save them as contacts. Packed with everything you need to stay organized while building and maintaining productive professional relationships, CircleBack makes it easier than ever to keep connections alive and get stuff done. CIRCLEBACK FEATURES • Contact updates when people in your network change jobs, roles & more • Intelligent merging / management of duplicate contacts • “New Contact” discovery from email signatures in Outlook, Gmail & the entire Microsoft account suite (Outlook.com, Hotmail, MSN, etc.) • Contact grouping by favorite, old/archived, or business card scans • A single, unified address book that imports from Outlook/Exchange , Gmail (Google Apps), Microsoft account suite, Facebook & more • Contact sync across multiple devices and platforms • Export contacts to Salesforce & ACT! • Best-in-class OCR business card scanning • Deleted contact recovery for the moments you make a mistake WHAT THE MEDIA IS SAYING • “CircleBack lets you sit back as it does the real-time contact updates and management for you.”— iphoneappsreviewonline.com • “Every once in a while I have this fever dream that I’d have a smartphone contact book that would be up-to-date and completely filled out, but that’s all it is—just a dream. But with CircleBack, I have a fighting chance.” — Gizmodo • “CircleBack uses artificial intelligence and crowd-based intelligence technology to automate contact updating and management. A useful tool to activate your contact list.” — Computerworld • “The modern world is busy and engaged, and your professional and personal contacts merge. But how can you keep up with what they’re doing? CircleBack uses artificial intelligence and crowd-based intelligence technology to automate contact updating and management.” — TechCrunch • “CircleBack knows your contacts better than you do. By automatically cleaning, completing, and updating your contacts, as well as removing duplicates, CircleBack keeps your address book organized and up-to-date.” — abduzeedo • “CircleBack is helpful app that makes sure that you address book is up-to-date. But, the app also consolidates all of your contacts by removing duplicate entries and repairing errors like typos. It can also locate missing contact information or updated information from outdated contacts.” — Forbes REVIEWS LEFT ON THE APP STORE • “Continuously improving” • “Simple, Powerful, intuitive” • “Very Useful Complement To Apple's Contacts App” • “Great & Simple App” MORE ABOUT CIRCLEBACK CircleBack’s unique answer to contact management is a single tool that ensures your address book is up-to-date, unified & accessible on all your devices. CircleBack handles the time-consuming organization of your digital address book while you do what you do best: crush it daily. DATA USAGE Crowdsourcing powers CircleBack’s core, allowing you (and everyone else) to anonymously contribute to the intelligence of our database. Your contributions are matched with billions of other data points from millions of other users to provide the best, most up-to-date info for anyone that’s outdated or duplicated in your address book. We love hearing from you! Keep the comments coming by emailing us anytime at support@circleback.com.
Screenshots
Verdict
The clearest difference is review sentiment: CircleBack at 61% against KleinMobile's 0%. CircleBack also leads on rating (4.5 vs 1.7) and ratings volume (2.5K vs 3). KleinMobile's advantage is device support (3 vs 1). On price, update cadence, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CircleBack holds the better App Store score, 4.5 against 1.7. That said, the two scores are not equally well evidenced: CircleBack has 2.5K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of KleinMobile's written reviews are positive against 61% of CircleBack's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 10, 2026 and October 17, 2026 respectively.
| Parameter | KleinMobile | CircleBack |
|---|---|---|
| Price | Free | Free |
| Rating | 1.7 (3 ratings) | 4.5 (2.5K ratings) — better |
| Positive reviews | 0.0% of reviews | 60.8% of reviews — better |
| Number of ratings | 3 | 2.5K — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 16 — better | 17.6 |
| Further details — not scored | ||
| Size | 64 MB | 118 MB |
| Age rating | 17+ | 17+ |
| Developer | Tidalis Americas Ltd | CircleBack, Inc. |
Customer experience
KleinMobile
CircleBack
Bugs and requests
KleinMobile
Not enough reviews yet to summarise bugs or requests.
CircleBack
Reported bugs
4 issues- Fails to update contacts on devices
- Incorrectly merges unrelated contacts
- Loses contact notes and other data
- Unreliable sync between app and phone contacts
Requested features
4 requests- Add ability to remove contacts from groups
- Improve search functionality
- Allow starting with a fresh contact list
- Provide better backup/restore options
In-app purchases
KleinMobile
No in-app purchases
CircleBack
No in-app purchases







