Comparison

Brain AI Daily vs May Diary

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

Head to head
About

Brain AI Daily

Features
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Unlock Your Brain’s Full Potential with Brain AI. Are you feeling overwhelmed by scattered notes, endless checklists, and fragmented team discussions? Meet Brain AI, the all-in-one personalized AI workspace designed to turn your ideas into action and your chaos into clarity. Whether you’re a solo dreamer or a collaborative team, Brain AI acts as your digital second brain, helping you manage everything from morning goals to complex project discussions.

About

May Diary

Features
Read full description

MayDiary is a private journal. Write, or dictate, and ask about what you wrote. KEY FEATURES: DIARY ANALYSIS: Ask for a summary, the important moments, your mood, recurring patterns, or practical suggestions. You can also ask your own question. Choose a week, a month, a year, or the whole diary. The answer uses your entries. A shorter period is still read in the context of the rest of the diary. DICTATION: On iOS 26, Apple transcribes supported languages on your iPhone. The recording stays on the device, and the speech model downloads once. Where Apple has no on-device model for your language, dictation is sent to OpenAI. After you stop, the transcript is written into the entry. An optional cleanup pass can tidy grammar and formatting; that pass sends the text to OpenAI. TAGS: Keep up to five tags. Add them yourself or let the app suggest them from the entry. Filter the list by a tag. The same tags are used for analysis and for finding entries. FIND ENTRIES: Ask in your own words. MayDiary returns the matching entries. It looks at the wording, the dates, and the tags, not only at an exact phrase. PRIVACY: Entries stay in the app and, if you turn sync on, in your private iCloud. Lock the diary with Face ID, Touch ID, or your device passcode. MayDiary shows no ads and does not collect your writing. Analysis, finding entries, suggested tags, and OpenAI dictation use your own OpenAI key. Those requests are sent with storage turned off. The key is kept in the iPhone Keychain. EDITOR: A plain editor with Markdown: headings, quotes, lists, bold, and italic. NOTE: Apple dictation does not need an OpenAI key. The other AI features do. Setup instructions are in the app.

Screenshots

Brain AI Daily4 screens
May Diary4 screens

Verdict

The call

The clearest difference is update cadence: May Diary at fortnightly against Brain AI Daily's every 2 months. Brain AI Daily's advantage is iOS requirement (15.1 vs 18.4). 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. Brain AI Daily sells 2 in-app purchases, starting at $3.99 per month and May Diary sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Brain AI Daily ships an update every 2 months, May Diary fortnightly. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

Scorecard2 real differences Β· 4 level
Brain AI Daily versus May Diary: the parameters behind the verdict, then further details
ParameterBrain AI DailyMay Diary
PriceFreeFree
Update frequencyEvery 2 monthsFortnightly β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 β€” better18.4
Further details β€” not scored
Size38 MB12 MB
Age rating4+12+
DeveloperOpencollar Technologies LLCPETR HAZUZA

In-app purchases

2 purchases

Brain AI Daily

Subscriptions1
  • BrainMonthly$3.991 Month
One-time1
  • Brain AI Credits$1.99
3 purchases

May Diary

One-time3
  • Buy Me a Coffee$0.99
  • Support Development$2.99
  • Big Thank You$4.99

Questions

Is Brain AI Daily free?
Brain AI Daily is free to download, with in-app purchases available.
Is May Diary free?
May Diary is free to download, with in-app purchases available.
Do Brain AI Daily or May Diary have ads?
Neither Brain AI Daily nor May Diary shows ads.
Which is updated more often, Brain AI Daily or May Diary?
Brain AI Daily ships an update every 2 months, and May Diary fortnightly. Most recently, Brain AI Daily was updated on October 14, 2026 and May Diary on October 25, 2026.

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