Comparison

Cloud Outliner vs Singularity Codex

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

Head to head
About

Cloud Outliner

This app helps you structure your thoughts and tasks into clear, organized lists. It offers visual organization, synchronization across devices, and rich editing features for easy management of your ideas and plans. Share your organized content easily with others.

Highlights
  • Multi-level document management
  • Drag & drop reordering
  • Swipe to indent
  • Rich text formatting
  • iCloud synchronization
  • Export to PDF and OPML
  • Password protection
Features
Read full description

Cloud Outliner helps you turn ideas and tasks into clear, structured lists. Capture thoughts instantly, organize them visually, and keep everything synchronized across your Mac, iPhone, and iPad with iCloud. With rich editing, intuitive gestures, and easy sharing, staying organized has never been easier. Install Cloud Outliner and bring clarity to your work and life. Key Features Organize and Protect • Multi-level document manager • Color tags for quick highlights • Password protection • Custom templates • Duplicate documents Powerful Outline Editor • Drag & drop to reorder • Swipe to change indentation • Multi-select for bulk actions • Checkboxes and auto-numbering • Notes for list items • Rich text formatting and highlighting • Collapse or expand any level • Filters, undo/redo, copy/paste • Link and phone number detection • Read-only mode • Wireless keyboard support with shortcuts Sync and Share • Sync across iPhone, iPad, and Mac with iCloud* • Mac version available • Export to PDF, OPML, plain text • Import OPML files • Print via AirPrint • Share by email or messenger Extra • Light and Dark mode • Clean, intuitive design • Portrait and landscape support * Sync with Mac requires Cloud Outliner Pro for macOS, sold separately.

About

Singularity Codex

Features
Read full description

The only person worth messaging is you. Singularity Codex is a private chat with yourself — a note-to-self app, a journal and a personal archive in one conversation. Text yourself a thought. Send yourself a photo, a voice note, a link, a PDF. It lands where you left it, in the order you had it, and it stays there. No folders to choose. No titles to write. No account to create. You already message yourself. Everyone does: the chat with just you in it, the email to your own address, the notes app you never open twice. Codex is what that habit deserves — a codex of your own life, written a line at a time and kept for good. SEND YOURSELF ANYTHING • Notes, thoughts, ideas, lists — type and send • Photos and videos from your library, or straight from the camera • Voice messages, transcribed on your iPhone so you can search what you said • Links, with a preview card instead of a bare address • PDFs and documents from Files • Anything from any app, through the share sheet • Hands-free with Siri and Shortcuts: "Send to Codex" • Reply to an old message to carry a thought forward • Star, pin, copy, or select many at once REMINDERS WRITTEN IN YOUR OWN WORDS Write "Call the dentist tomorrow at 10" and Codex offers the reminder. One tap and it is set — no form, no date picker, no second app. It understands English, Turkish, German, French and Spanish. The Now tab gathers what matters today: overdue, due today, tasks, pinned messages, what you just saved, and what you wrote on this day. YOUR PERSONAL HISTORY, DRAWN The Codex tab turns your archive into a history you can read. Every year you have kept becomes twelve calendars, shaded by how much you wrote. Tap any day and read yourself back. Collections build themselves — starred, pinned, reminders, tasks, links, photos, videos, voice, files — and on-device labels such as Idea, Task, Work, Personal, Memory and Event sort your messages without you ever filing a thing. Now and then, Codex shows you what you wrote a week, a month or a year ago. TODAY: WHAT YOU CHOSE TO READ Follow a site's feed, a podcast, a YouTube channel, a Mastodon or Bluesky account, a subreddit. Posts arrive newest first, grouped by day — no algorithm, no ranking, nothing promoted. Mute a word, hide someone, or keep a post in your archive with one tap. FIND ANYTHING IN A SECOND Search every message, link title, file name and voice transcript at once, then narrow it to photos, links, voice, files or ideas. PRIVATE BY ARCHITECTURE, NOT BY PROMISE • No account. No sign-up. No login. • No analytics, no tracking, no ads, no third-party SDKs • No server of ours — there is nowhere for your archive to be sent • Labels are worked out on your iPhone and never leave it • Voice is transcribed on the device, or not at all • App Store privacy label: Data Not Collected ICLOUD, ONLY IF YOU WANT IT Turn on sync and your archive — messages, photos, recordings and documents — lives in your own private iCloud database and appears on your other iPhones. We have no access to it. With Advanced Data Protection on, it is end-to-end encrypted. AN ARCHIVE YOU CAN LEAVE WITH Export everything, any time: your messages as JSON and as plain text, with every photo, recording and document, in one zip that opens without this app. Save any photo or video back to your library in a tap. MAKE IT YOURS Five color themes, light and dark appearance, and the whole app in five languages. ONE PRICE. NO SUBSCRIPTION. Try everything free for 14 days. When the trial ends, your archive stays readable, searchable and exportable — forever, at no cost. Adding new messages takes one purchase, once. No subscription, no renewals, no ads. Your thoughts are not content. Your archive is not a product. Start your codex.

Screenshots

Cloud Outliner4 screens
Singularity Codex4 screens

Verdict

The call

The clearest difference is device support: Cloud Outliner at 3 against Singularity Codex's 1. Cloud Outliner also leads on iOS requirement (15.0 vs 26.0). 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. Cloud Outliner sells 1 one-off in-app purchase and Singularity Codex sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
Cloud Outliner versus Singularity Codex: the parameters behind the verdict, then further details
ParameterCloud OutlinerSingularity Codex
PriceFreeFree
Rating4.5 (751 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings751 — better—
Update frequencyEvery 6 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better26.0
Further details — not scored
Size23 MB5 MB
Age rating4+17+
DeveloperDenys IevenkoBURAK KADAN

Bugs and requests

Cloud Outliner

Reported bugs

3 issues
  • Crashes and freezes on certain devices
  • Issues with restoring Pro purchases on new devices
  • Inconsistent syncing behavior between iOS and macOS versions

Requested features

5 requests
  • Add support for attaching files and images
  • Improve export options beyond OPML
  • Introduce a true dark mode with black text on dark background
  • Add keyboard shortcuts for common actions
  • Enhance the ability to move and reorganize outline items

Singularity Codex

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Cloud Outliner

One-time1
  • Unlock Pro Features$4.99
2 purchases

Singularity Codex

One-time2
  • 14-day TrialFree
  • Codex, for good$12.99

Questions

Is Cloud Outliner free?
Cloud Outliner is free to download, with in-app purchases available.
Is Singularity Codex free?
Singularity Codex is free to download, with in-app purchases available.
Do Cloud Outliner or Singularity Codex have ads?
Neither Cloud Outliner nor Singularity Codex shows ads.

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