Comparison

Did I Do? 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

Did I Do?

This app helps you track daily tasks with elegant home screen widgets. Mark tasks complete with a single tap, providing instant clarity for common daily questions like medication or locking doors. It's a personal verification system built for real-life management.

Highlights
  • Home screen widgets
  • One-tap task completion
  • Customizable notifications
  • Photo verification
  • iCloud sync
  • Daily/custom interval resets
Features
Read full description

Did I Do? puts your daily task tracking right on your home screen with beautiful, minimal widgets. One tap to mark tasks done, instant clarity when you need it. WHY CHOOSE DID I DO? Elegant Home Screen Widgets Transform your home screen into a command center for daily tasks. Complete activities with a single tap - no need to open the app. Up to 5 tasks on a single widget! Perfect for Those Daily Questions: - "Did I take my medication?" - "Did I lock the front door?" - "Did I feed the cat?" - "Did I turn off the stove?" Your personal verification system, always at hand. Thoughtfully Crafted Features: - Intelligent daily or custom interval resets - Customizable notifications with snooze options (Plus feature) - Task completion with photo verification - Share tasks with family and friends - Track habits and correct past days in Habit Tracker - iCloud sync across all your devices - Clean, intuitive interface that stays out of your way Built for Real Life: Whether you're managing medications, household responsibilities, or daily routines, Did I Do? helps you track what matters with confidence and ease. The Power of Certainty: Replace doubt with knowledge. Transform "Did I...?" into "I did." Getting Started: Did I Do? is free to try with one task. Unlock unlimited tasks, notifications, and premium features with a Plus subscription or lifetime purchase. Free-trial availability and duration depend on your eligibility and selected subscription. See the offer in the app before subscribing. Terms of Use: https://didido.plus/terms Privacy Policy: https://didido.plus/privacy

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

Did I Do?4 screens
Singularity Codex4 screens

Verdict

The call

The clearest difference is iOS requirement: Did I Do? at 17.4 against Singularity Codex's 26.0. 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. Did I Do? sells 5 in-app purchases, starting at $0.99 per 7 days and Singularity Codex sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Did I Do? versus Singularity Codex: the parameters behind the verdict, then further details
ParameterDid I Do?Singularity Codex
PriceFreeFree
Rating4.3 (84 ratings) — better—
Positive reviews45.9% of reviews—
Number of ratings84 — better—
Update frequencyEvery 2 weeks—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.4 — better26.0
Further details — not scored
Size63 MB5 MB
Age rating4+17+
DeveloperApplorium LtdBURAK KADAN

In-app purchases

5 purchases

Did I Do?

Subscriptions4
  • Weekly3 Days trial$0.997 Days
  • Monthly7 Days trial$0.991 Month
  • Weekly3 Days trial$1.997 Days
Show 1 more
  • Yearly7 Days trial$7.991 Year
One-time1
  • Lifetime$17.99
2 purchases

Singularity Codex

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

Questions

Is Did I Do? free?
Did I Do? 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 Did I Do? or Singularity Codex have ads?
Neither Did I Do? nor Singularity Codex shows ads.

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