Comparison

ChatInbox vs SecondBrain Pro

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

Head to head
About

ChatInbox

This app reimagines your email by organizing it around people, not dates. View all conversations with a contact in a chat-style format, making it easy to find past messages and attachments. It supports multiple email accounts and devices, offering a streamlined inbox experience.

Highlights
  • Contact-centered inbox
  • All accounts in one inbox
  • Smart contact grouping
  • Attachments by person
  • Calendar view
  • Email reminders
Features
Read full description

In a traditional inbox, emails from the people who matter most get buried under everything else. ChatInbox puts people first — grouping every message by contact, so each person's conversation is always one tap away. Tap a contact. See everything you've ever exchanged — messages, attachments, history — all in one clean, chat-style view. No more hunting through a chronological pile of unread mail to find that one message from your client, your accountant, or your kid's school. If you've ever wished email worked like iMessage — but for every account, every provider, all in one place — ChatInbox is what you've been looking for. CONTACT-CENTERED INBOX Every email is grouped by sender. Your contact list shows the most recent conversation first, each person appearing only once. Open a contact to see your full history, displayed as a natural back-and-forth conversation. UNIFIED ACCOUNTS Connect Gmail, Outlook, iCloud, and any IMAP account. All your email, all your contacts, one inbox — synced across iPhone, iPad, and Mac. SMART CONTACT GROUPING ChatInbox automatically groups related contacts — airlines, hotels, online shopping, subscriptions — so you can manage entire categories of email at once. CALENDAR EMAIL FILTER Browse your inbox by date using the built-in calendar view. Find any message from any day without searching. VISUAL ORGANIZATION Tag and organize emails on a Kanban board. Track what needs attention, what's waiting for a reply, and what's done. REMINDERS & NOTIFICATIONS Set custom reminders on any email. Get notified about messages that matter and let the rest wait. MARKDOWN COMPOSER Write polished emails with built-in Markdown formatting. Style text clearly without wrestling with toolbars. PRIVACY FIRST Your emails stay on your devices. ChatInbox connects directly to your mail servers — no third-party servers, no data mining, no tracking. Previously used Unibox and miss email grouped by sender? ChatInbox carries that vision forward — rebuilt from the ground up for modern Apple platforms, with features Unibox never had. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

SecondBrain Pro

Features
Read full description

Your Personal AI-Augmented Memory SecondBrain helps you capture, organize, and recall your thoughts, ideas, and learnings using voice-first capture and AI-powered search. INSTANT VOICE CAPTURE • Tap to record, automatic transcription • Works on iPhone, Apple Watch, iPad • Background recording for long thoughts • Premium Neural TTS for voice playback AI-POWERED RECALL • Natural language search: "What did I learn about React last week?" • On-device AI chat with your memory context • Temporal queries: "yesterday", "last month", "last summer" • Smart tagging and categorization CHOOSE YOUR STORAGE FREE - Local Only • Store memories on your device • Voice capture with standard TTS • On-device AI chat (10 memory context) • Perfect for getting started STANDARD - CHF 7.99 (One-Time) • Everything in Free + • iCloud Sync across all your Apple devices • Premium Neural TTS voices • Expanded AI context (50 memories) • Export to JSON/Markdown • iPhone ↔ iPad ↔ Watch ↔ Mac sync PREMIUM - CHF 17.99 (One-Time) • Everything in Standard + • Custom CloudFlare Worker backend • AI Auto-Correction of voice input • AI Summarization of search results • Quality Boosting for better relevance • GDPR compliant, EU servers PRIVACY-FIRST • No account required (Free & Standard tiers) • On-device AI processing (iOS 26+ Apple Intelligence) • Optional bring-your-own-backend (Premium) • End-to-end encrypted sync (iCloud) • You own your data, always KEY FEATURES • Voice recognition in multiple languages • Real-time transcription overlay • Memory types: Note, Task, Learning, Decision, Discovery • Tag-based organization • Temporal search ("today", "last week", "last year") • Export your data anytime • Dark mode support • Apple Watch companion app PRICING • FREE: 100 local memories • STANDARD: CHF 7.99 (iCloud Sync, unlimited) • PREMIUM: CHF 17.99 (CloudFlare AI, unlimited)

Screenshots

ChatInbox4 screens
SecondBrain Pro4 screens

Verdict

The call

The clearest difference is update cadence: ChatInbox at every 5 days against SecondBrain Pro's every 2 months. 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. ChatInbox sells 3 in-app purchases, starting at $2.99 per month and SecondBrain Pro sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ChatInbox ships an update every 5 days, SecondBrain Pro every 2 months. Both last shipped on September 17, 2026.

Scorecard1 real difference · 9 level
ChatInbox versus SecondBrain Pro: the parameters behind the verdict, then further details
ParameterChatInboxSecondBrain Pro
PriceFreeFree
Rating4.4 (29 ratings) — better—
Positive reviews61.8% of reviews—
Number of ratings29 — better—
Update frequencyEvery 5 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size45 MB10 MB
Age rating4+4+
DeveloperInnovatism LLCHeinrich Krupp

In-app purchases

3 purchases

ChatInbox

Subscriptions2
  • Premium Monthly14 Days trial$2.991 Month
  • Premium Yearly14 Days trial$19.991 Year
One-time1
  • Premium Lifetime$24.99
2 purchases

SecondBrain Pro

One-time2
  • Standard$7.99
  • SecondBrain PREMIUM$17.99

Questions

Is ChatInbox free?
ChatInbox is free to download, with in-app purchases available.
Is SecondBrain Pro free?
SecondBrain Pro is free to download, with in-app purchases available.
Do ChatInbox or SecondBrain Pro have ads?
Neither ChatInbox nor SecondBrain Pro shows ads.
Which is updated more often, ChatInbox or SecondBrain Pro?
ChatInbox ships an update every 5 days, and SecondBrain Pro every 2 months. Most recently, ChatInbox was updated on September 17, 2026 and SecondBrain Pro on September 17, 2026.

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