Comparison

Second Brain vs VoiceCalendar AI

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

Head to head
About

Second Brain

Features
Read full description

Manage notes, to-dos, and your schedule in one app. Capture thoughts as notes, actions as to-dos, and anything with a date on the calendar. No more hopping between apps. β–  Notes Write fast, organize later. Sort into folders and find anything with search. Share only the notes you choose via a link, and unshare with a single tap. β–  To-Dos Set due dates and repeat rules. See what's left with D-Day countdowns, and group tasks by category. β–  Calendar See to-dos and events on the same screen. Switch between month and week views to check how full your week is. β–  Widgets Check today's tasks from your Home Screen and Lock Screen. See what's left without opening the app. β–  Notifications Get notified as deadlines approach. Start the day with a morning briefing and wrap up with a daily summary. β–  AI Organize Pull action items out of long text. Turn copied text into to-dos. Gather past records into a retrospective. AI features are free up to 3 times per month. To use more, connect your own AI API key. β–  Same content on every device Notes written on iPhone open on the web too. Sign in once and your content follows you across devices. β–  Privacy AI features only process text you explicitly send. See the privacy policy for details. https://docs.ainote.dev/legal/privacy

About

VoiceCalendar AI

Features
Read full description

VoiceCalendar turns a single sentence into a calendar event. No tapping through forms. Just speak β€” or paste a block of text β€” and the AI extracts the time, location, and people, then creates the event for you. Tired of typing every meeting and reminder? Voice Calendar AI turns your words into calendar events. Just speak β€” AI extracts the date, time, person, place and title, then writes the event straight to your iPhone calendar in one tap. Works in Chinese (Traditional & Simplified), English, Japanese, Korean and Spanish. Key features: β€’ Voice to event: say it once, AI builds the event β€’ Paste to schedule: copy a message, open the app, AI parses and splits it into multiple events β€’ Learns names: fix a misheard name once, it auto-fills correctly next time β€’ 6-language support: speak in your preferred language β€’ One-tap sync: writes to Apple, Google & Outlook calendars β€’ Conflict detection: warns when events overlap β€’ Multilingual support: 6 languages auto-recognition and parsing β€’ Offline rules: still parses common dates and times without internet Stop typing. Start speaking. 7-day free trial, then auto-renews. Cancel anytime in iOS Settings.

Screenshots

Second Brain4 screens
VoiceCalendar AI4 screens

Verdict

The call

The clearest difference is in-app purchases: Second Brain at none against VoiceCalendar AI's 2. VoiceCalendar AI's advantage is update cadence (weekly vs monthly) and iOS requirement (16.0 vs 26.0). On price, ads 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. VoiceCalendar AI sells 2 in-app purchases, starting at $3.99 per month. Second Brain asks for nothing beyond the download.

UpkeepUpdate frequency

Second Brain ships an update monthly, VoiceCalendar AI weekly. Both last shipped on October 31, 2026.

Scorecard3 real differences Β· 3 level
Second Brain versus VoiceCalendar AI: the parameters behind the verdict, then further details
ParameterSecond BrainVoiceCalendar AI
PriceFreeFree
Update frequencyMonthlyWeekly β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad β€” betteriPhone
Requires iOS26.016.0 β€” better
Further details β€” not scored
Size37 MB6 MB
Age rating4+4+
DeveloperDcodeTZYYCHYI TSAI

In-app purchases

None

Second Brain

No in-app purchases

2 purchases

VoiceCalendar AI

Subscriptions2
  • θͺžιŸ³θ‘ŒδΊ‹ζ›† AI7 Days trial$3.991 Month
  • AI εΉ΄θ²»ζ–Ήζ‘ˆ7 Days trial$22.991 Year

Questions

Is Second Brain free?
Second Brain is free to download, with no in-app purchases.
Is VoiceCalendar AI free?
VoiceCalendar AI is free to download, with in-app purchases available.
Do Second Brain or VoiceCalendar AI have ads?
Neither Second Brain nor VoiceCalendar AI shows ads.
Which is updated more often, Second Brain or VoiceCalendar AI?
Second Brain ships an update monthly, and VoiceCalendar AI weekly. Most recently, Second Brain was updated on October 31, 2026 and VoiceCalendar AI on October 31, 2026.

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