Comparison

RealTech Passkey vs ExtMemo

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

Head to head
About

RealTech Passkey

Generate authentication codes for secure online account access. Easily add accounts by scanning QR codes and store security keys. Advanced encryption protects your personal data.

Highlights
  • OTP generation
  • QR code scanning for account setup
  • Security key storage
  • Advanced encryption
  • Quick authentication code generation
Features
Read full description

RealTech Passkey is an OTP generator app that helps you log into all your online accounts. Scan QR codes to add accounts, store security keys, and generate authentication codes quickly. Protect personal data with advanced encryption technology.

About

ExtMemo

Capture, secure, and intelligently recall your ideas with an AI-powered external memory system. Offers end-to-end encryption for absolute privacy and seamless collaboration features. Export your data anytime without vendor lock-in.

Highlights
  • Smart Recall AI
  • Zero-Knowledge E2EE
  • Conflict-Free Collaboration
  • Encrypted Team Sharing
  • Web and Desktop App
  • Markdown Data Export
  • AI-Powered Mind Extension
Features
Read full description

[+] Unique Info-Chain Architecture - Group related information into sequential chain, not folders. - Connect fragmented information into one organized thread. - Quick Chain Creation — create a new chain and connect it to the current one. - Add daily or milestone updates to track projects end-to-end. - Track height changes and dental visits in chronological chains. - Give each travel day its own note, with plans and bookings in one chain. [+] End-2-End Encrypted, and Searchable - Granular Flexible Encryption: Encrypt an entire note or only its most sensitive content. - Chain-Wide Search: Unencrypted notes can index and search the entire Note Chain. - Stored neither on the server nor on your device: only briefly in memory when needed for decryption. - Flexible Face ID & Fingerprint Protection — for encrypted content, app access, or not at all. [+] Visible Todos In Context - Todos stay in context: Part of your meeting notes, not a separate task list. - Simple by design: Just set a due date. No complicated setup. - Visualize dependencies: See what to do first and what comes next at a glance. - Organize your thoughts: Turn ideas and tasks into a visual mind map. - Track completion automatically: Completion time is recorded automatically. - Stay on track: Get daily reminders for todos due within the next 5 days. - Manage time-sensitive benefits: Never lose track of unused coupons, credits, or expiring offers. [+] Synced to Desktop (Web App), More Powerful, Maximum Efficiency - Work seamlessly across devices: Stay in sync and handle information more efficiently on the desktop. - Import with ease: Bring your notes into ExtMemo with JSON or Markdown. - Export everything: Export your entire note collection in Markdown for easy access and portability. - Explore your knowledge visually: Use the Nebula View to see semantically connected Note Chains at a glance. - Build your todo flow visually: Drag todos into place and connect them with dependencies. [+] Valuable & Private Information, Shared Securely - Share entire chains: Share Note Chains securely with teammates or family members. - Share encrypted content: E2EE-protected information can be shared without giving up privacy. - Everyone adds their own notes: Members can add or update notes without interfering with each other. - Keep information up to date: Multiple people can update the same chain, keeping everyone aligned on the latest status. [+] More Features - AI Assistant — Your intelligent companion for understanding, finding, and managing your information. - Turn off AI Assistant anytime — it won't access your information. - Sign in instantly with Apple or Google — no separate account needed. - Markdown Editor: Write and format notes with Markdown. - Cross-Chain Links: Link chains together and jump between them instantly. - Bookmarks: Save important notes for quick access. - Dark Mode: A comfortable experience in low-light environments. - Flexible E2EE Rules: Choose what to encrypt: manually, everything, or everything except the top note. - Two Visual Styles: Choose between Simple and Classic styles. - Arrange the information in your Info-Chain in any order you like. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

RealTech Passkey3 screens
ExtMemo4 screens

Verdict

The call

The clearest difference is in-app purchases: RealTech Passkey at none against ExtMemo's 3. On price, review sentiment, update cadence and ads 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. ExtMemo sells 3 in-app purchases, starting at $2.99 per month. RealTech Passkey asks for nothing beyond the download.

UpkeepUpdate frequency

RealTech Passkey ships an update every 8 days, ExtMemo every 2 weeks. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
RealTech Passkey versus ExtMemo: the parameters behind the verdict, then further details
ParameterRealTech PasskeyExtMemo
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 8 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size39 MB46 MB
Age rating4+4+
DeveloperNEXT GENERATION NETWORKExtMemo AI Technology (Beijing) Co., Ltd

Customer experience

RealTech Passkey

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ExtMemo

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RealTech Passkey

No in-app purchases

3 purchases

ExtMemo

Subscriptions2
  • Monthly1 Month trial$2.991 Month
  • Annually2 Months trial$29.991 Year
One-time1
  • Linked Note AI$3.99

Questions

Is RealTech Passkey free?
RealTech Passkey is free to download, with no in-app purchases.
Is ExtMemo free?
ExtMemo is free to download, with in-app purchases available.
Do RealTech Passkey or ExtMemo have ads?
Neither RealTech Passkey nor ExtMemo shows ads.
Which is updated more often, RealTech Passkey or ExtMemo?
RealTech Passkey ships an update every 8 days, and ExtMemo every 2 weeks. Most recently, RealTech Passkey was updated on October 9, 2026 and ExtMemo on October 24, 2026.

Other comparisons