ShakeMyHand vs Mark Bookmark
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ShakeMyHand
This app helps verify the authenticity of digital communications, ensuring you're interacting with the intended person. It's useful for confirming urgent requests, financial transactions, and sensitive data sharing with friends, family, and colleagues.
- Verify sender authenticity
- Secure financial transaction confirmation
- Confirm family member requests
- Team data security
- Secure role and permission granting
- Confirm remote team member identity
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Ever wondered if that 'urgent' message from your boss is legit, or if your friend's quirky text was actually sent by them? In this era of digital trickery, ShakeMyHand is here to help. It's a nifty app that cuts through the noise, ensuring that the person texting you for your weekend plans or the team member pinging you for a last-minute meeting is the real deal. No more second-guessing texts or emails. With ShakeMyHand, peace of mind is just a quick verification away, keeping your digital conversations authentic and worry-free. Safeguard financial transactions with colleagues, friends, and family: Before sending bank transfers or sending money through apps like Venmo or PayPal based on an e-mail, text request, or phone call, use ShakeMyHand to confirm it's truly your colleague or friend asking. Verify messages from family members: When you receive unusual requests or messages from family members, especially in urgent situations, ShakeMyHand can confirm their authenticity. Team data security: Need to swap login details or API keys in your team? With ShakeMyHand's easy passphrases, team members can make sure they're sharing sensitive info with the right people, keeping everything tight and secure, especially in remote setups. Grant roles and permissions securely: When a team member needs new roles or privileges in a tool or system, ShakeMyHand steps in. Just swap a quick passphrase to confirm it's them asking, and you're all set to update access safely. Confirm the identity of remote team members: Before sharing sensitive project details in a virtual team meeting, use ShakeMyHand to ensure you're communicating with the actual team. How does it work? 1. Install the app: First, both you and your contact (be it a friend, colleague, relative, or anyone else) need to download ShakeMyHand on your phones. 2. Scan the QR code: Next time you meet in person, open ShakeMyHand and scan each other's QR code. This is a quick and secure way to exchange digital identifiers, much like modern, secure business card exchange. 3. Synced for life: After scanning, your apps are now paired. From this point on, both phones will generate the same secret three-word passphrase. This passphrase acts as a unique, lifelong password that remains in perfect sync everytime it re-generates. 4. Verification anytime: Now, whenever you need to confirm each other's identity - through text, email, phone calls, or video chats - use your shared passphrase. A matching phrase means you're communicating with the right person, ensuring authenticity in your digital interactions.
Mark Bookmark
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Mark II is a smart bookmark that captures your physical notes and ideas, and turns it into organized insights for you to revisit later CAPTURE WITHOUT LEAVING THE PAGE Scan a passage and it's saved, at 99% text accuracy, with any missing letters or words reconstructed automatically. Or hold to record a voice note instead. No unlocking your phone, no typing, no losing the thread of the chapter. It works across your whole reading life — hardcovers, paperbacks, printouts, research papers, Kindle, iPad, and handwriting (beta). 30+ languages. A LIBRARY THAT BUILDS ITSELF Scan a book's ISBN once (beta) and everything you capture from then on files itself under the right title. No folders to design, no tags to maintain, nothing named twice. Over months, it becomes a catalogue of what you've actually read — not a system you have to keep feeding. FIND THE QUOTE YOU HALF-REMEMBER Search for a fragment and get the passage back with its source. Filter by topic, theme, or the moment you captured it. Copy it straight into whatever you're writing. TALK TO WHAT YOU'VE READ Chat with your own highlights and annotations. Trace an idea across different books. Ask about the thing you know you read but can't place. Mark AI answers from what you've captured and nothing else — it won't invent a passage, and it won't summarize a book you never opened. FITS THE SYSTEM YOU ALREADY HAVE Integrations with Readwise, Notion, and many more apps to come. Mark isn't asking you to move in. It's asking you to feed what you've already built. WORKS WHEREVER YOU READ Bluetooth only — pairs like AirPods. Captures save on the device when you're out of range and sync the moment you're back. A single USB-C charge lasts about a week of heavy reading. YOUR NOTES, HELD CAREFULLY Highlights and voice notes are encrypted and stored on AWS in North America. We don't hold personally identifiable information alongside your library, and you can request deletion of your data at any time. WHO IT'S FOR Students who annotate. Researchers who cite. Readers who underline in pencil and mean it. Anyone who has closed a book and been unable to say what was in it. WHAT'S FREE Downloading Mark is free, and so is everything core: highlighting, audio capture, auto-organization, and basic AI chat. An optional subscription unlocks the heavier AI features and advanced integrations. REQUIREMENTS The Mark II device is required for scanning and voice capture. Each device pairs to one account at a time. iOS only. Support: Support@mark.engineering Privacy Policy: thinkwithmark.com/policies/privacy-policy
Screenshots
Verdict
ShakeMyHand and Mark Bookmark are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | ShakeMyHand | Mark Bookmark |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 16.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | HUMEN Information Services B.V. | Mark Inc |
In-app purchases
ShakeMyHand
No in-app purchases
Mark Bookmark
No in-app purchases









