Comparison

Private Voice Inbox vs Singularity Codex

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

Head to head
About

Private Voice Inbox

Features
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Your voice memos are not β€œcontent.” They are unfiltered thoughts, client names, half-formed deals, and things you would never type into a search box. Most recording apps treat that as fuel for a cloud. Voice Inbox was built the other way around: privacy first, then transcription, then search. Record on your iPhone. Transcribe on your iPhone. Find it later β€” without an account, and without shipping your inbox to someone else’s server. Stop feeding your inner monologue to the internet. Stop losing ideas in a pile of "New Recording 47" files. Voice Inbox is the voice memo app built for findingβ€”not just recording. Capture fast, get a searchable transcript and smart title, then clear your inbox like email. RECORD ANYWHERE β€’ Record from the app, Lock Screen widget, or Siri Shortcut β€’ Three capture modes: Memo, Brainstorm, and Conversation (Premium) β€’ Apple Watch companion β€” capture on your wrist; transcription runs on your iPhone β€’ Pause and resume; up to 10 minutes per take β€’ Continue a memo with another segment, or expand into a thread with a new sibling β€’ Import audio files into your inbox SEARCHABLE IN SECONDS β€’ On-device Whisper transcription (default) β€” your recordings stay on your iPhone β€’ Optional external speech service β€” bring your own OpenAI-compatible endpoint in Settings (only when you turn it on) β€’ AI-generated titles (Apple Intelligence on supported devices, or your own OpenAI/Ollama profile) β€’ Full-text search across titles and transcripts β€’ Change a memo’s language and retranscribe with one tap INBOX ZERO FOR YOUR VOICE β€’ New memos land in Inbox; filter Inbox, All, or Archived β€’ Review today’s memos in one pass β€” keep, archive, or delete β€’ Optional evening reminder to clear the inbox before bed β€’ Trash with restore THREADS & CONVERSATIONS β€’ Group related memos into threads; mix memo, brainstorm, and conversation members β€’ Conversation transcripts show speaker chat bubbles; plain memos stay linear β€’ Photo attachments on memos; shared gallery on threads TAGS, SWIPES & FOLLOW-UPS β€’ Say β€œhash tag” plus keywords at the end of a memo, or add colored tags from a searchable picker β€’ Configurable swipe actions: Reminder, Email, Message, Calendar, Copy, Share, and more β€’ Swipe to schedule Apple Reminders; send transcript by email or message AI WHEN YOU WANT IT β€’ Summarize, improve formatting, or extract action items β€” on demand from memo detail β€’ Optional auto-classify and auto-enrich after transcription (Premium) β€’ Connect your own LLM profiles or use Apple Intelligence; prompts are editable in Settings INTEGRATIONS (PREMIUM) β€’ Create GitHub issues from a memo β€” transcript sent only when you confirm β€’ Voice Inbox Premium (optional): monthly, yearly, or lifetime β€” Conversation mode, auto-classify, category enrichment, GitHub; core capture, search, brainstorm, threads, and on-device transcription stay free PRIVATE BY DESIGN β€’ No Voice Inbox account; memos stored on your device β€’ Optional app lock β€” Face ID, Touch ID, device passcode, or custom PIN β€’ Whisper model weights may download over Wi‑Fi; your voice memos are not uploaded to Voice Inbox servers β€’ AI and GitHub features send text only to services you configure, when you use them PERFECT FOR β€’ Founders and PMs capturing ideas on walks β€’ Anyone drowning in untitled voice memos β€’ People who want searchable voice notes with a real inbox workflow Requirements: iPhone with iOS 17 or later. Apple Watch app optional (requires paired iPhone). Support: support@myvoiceinbox.app Privacy: https://myvoiceinbox.app/privacy/ Terms: https://myvoiceinbox.app/terms/ User guide: https://myvoiceinbox.app/guides/user-guide/ Open source notices: https://myvoiceinbox.app/licenses/

About

Singularity Codex

Features
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The only person worth messaging is you. Singularity Codex is a private chat with yourself β€” 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 β€” a codex of your own life, written a line at a time and kept for good. SEND YOURSELF ANYTHING β€’ Notes, thoughts, ideas, lists β€” type and send β€’ Photos and videos from your library, or straight from the camera β€’ Voice messages, transcribed on your iPhone so you can search what you said β€’ Links, with a preview card instead of a bare address β€’ PDFs and documents from Files β€’ Anything from any app, through the share sheet β€’ Hands-free with Siri and Shortcuts: "Send to Codex" β€’ Reply to an old message to carry a thought forward β€’ 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 β€” 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 β€” starred, pinned, reminders, tasks, links, photos, videos, voice, files β€” 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 β€” 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 β€’ No account. No sign-up. No login. β€’ No analytics, no tracking, no ads, no third-party SDKs β€’ No server of ours β€” there is nowhere for your archive to be sent β€’ Labels are worked out on your iPhone and never leave it β€’ Voice is transcribed on the device, or not at all β€’ App Store privacy label: Data Not Collected ICLOUD, ONLY IF YOU WANT IT Turn on sync and your archive β€” messages, photos, recordings and documents β€” 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 β€” 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

Private Voice Inbox4 screens
Singularity Codex4 screens

Verdict

The call

The clearest difference is iOS requirement: Private Voice Inbox at 17.0 against Singularity Codex's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Private Voice Inbox sells 3 in-app purchases, starting at $5.99 per month 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 Β· 5 level
Private Voice Inbox versus Singularity Codex: the parameters behind the verdict, then further details
ParameterPrivate Voice InboxSingularity Codex
PriceFreeFree
Update frequencyEvery 5 daysβ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Apple Watch β€” betteriPhone
Requires iOS17.0 β€” better26.0
Further details β€” not scored
Size62 MB5 MB
Age rating4+17+
DeveloperKarel ChwistekBURAK KADAN

In-app purchases

3 purchases

Private Voice Inbox

Subscriptions2
  • Voice Inbox Premium Monthly Sub$5.991 Month
  • Voice Inbox Premium Yearly Sub$49.991 Year
One-time1
  • Private Voice Inbox Prem Lifetime$79.99
2 purchases

Singularity Codex

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

Questions

Is Private Voice Inbox free?
Private Voice Inbox 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 Private Voice Inbox or Singularity Codex have ads?
Neither Private Voice Inbox nor Singularity Codex shows ads.

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