Comparison

3sec Diary vs Memox Journal

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

Head to head
About

3sec Diary

Quickly log daily activities and feelings in just three seconds. Your entries are securely stored in your iPhone Calendar, ensuring data safety and easy access. This tool helps you preserve memories and makes research and sharing effortless.

Highlights
  • 3-second daily logging
  • Calendar integration
  • Secure data storage
  • Easy research and sharing
  • Memory preservation
Read full description

This "3sec Diary” is not just a diary. You can input what you did, how you feel in this tool.It will take only 3 seconds!Your time will be saved. And you can leave it on your calendar on iPhone as long as you want. "3sec Diary “ data is not recorded on App on your iPhone.The data is recorded to your iPhone Calendar.You never miss your data when something wrong with this App. Researching ,synchronizing,sharing are so easy. This “3sec Diary” is not just a diary, but your memories.

About

Memox Journal

Read full description

Memox — Bind your words and your day into one. A phrase that just came to mind. A moment you don't want to forget. A feeling that brushed past. Memox is a personal iPhone app where your diary and notes grow quietly, as a single "map of words," inside your own iPhone. 【The 3 core concepts】 ■ Diary Today's flowing words. Add to it any number of times a day. ■ Words Phrases and realizations you want to keep. While writing, select any text and tap "Save as Word" right there. Quotes, names, a new expression, a question to yourself —— any grain size. ■ Tags A cross-cutting label for both diary and Words. "#work" "#family" "#reading" —— your own labels, ready to bundle later. Open a Word, and every diary entry that contains it is listed automatically (backlinks). As diary, Words, and Tags gradually connect, the more you write, the more your own "map of words" grows. 【Who Memox is for】 ・People who keep abandoning their diary and want to start again ・People whose phone memos are scattered and unsearchable ・People who want to capture and cultivate the quotes they care about ・People who want a place for their own words — not AI chat, not social media ・People who want their data to stay on their own device 【Main features】 ■ Diary editor ・Simple writing, no daily limit ・Attach photos; URLs auto-linked ・Select text and "Save as Word" inline ■ Words (your personal vocabulary) ・Add and edit any phrase you want to keep ・Connect with tags and related memos to build a network of concepts ・Open a Word to see every diary entry that contains it (backlinks) ・"Related Words" —— other Words that often appear alongside (Memox Plus) ■ Tags ・Cross-classify diary and Words with your own labels ・Open a tag to see all related entries at once ・Deleting a tag is safe: diary and Words remain — only the link is removed ■ Advanced search (Memox Plus) ・Operators like "tag:work" "photo:yes" "date:thismonth" pinpoint the past ■ Voice memos (on-device transcription) ・Capture thoughts by voice; transcribed automatically ・Audio and text stay on your device ■ AI Reflection ・Weekly and monthly reflections, summarized by Apple Intelligence ・Surfaces your recent words and mood trends ・※ Requires Apple Intelligence (iPhone 15 Pro+, iOS 26.1+) ■ Home / Lock Screen widgets ・Today's line, your streak, a suggested Word — always in view ・Lock-screen content can be redacted (privacy-conscious) ■ Face ID / Touch ID lock ・Protects both launch and resume from background ■ iCloud sync ・Secure sync across iPhones via iCloud Drive; can also be turned off ■ Export ・Export all data anytime as PDF, Markdown, or JSON. No lock-in. ■ 7 languages ・Japanese, English, German, Spanish, French, Korean, Traditional Chinese ■ Alternate app icons ・Change the app's face by mood or season 【About privacy】 Memox does not collect your personal data. Diary, Words, tags, audio, transcriptions, and AI summaries are stored only on your device or in your own iCloud. No transmission to any external server except the ad network (free tier only). Not a flashy AI, not an external cloud —— Memox is designed to grow inside your iPhone, for you alone. 【About Memox Plus】 Even free, you get the full basics of diary, Words, and tags. Upgrading unlocks: ・Remove ads ・PDF / Markdown / JSON export ・Home Screen widgets ・AI Reflection (Apple Intelligence devices only) ・Detailed statistics (word co-occurrence, mood trend graphs) ・Voice memos & auto-transcription ・Advanced search operators ・Related Words (extended backlinks) ・Alternate app icons Pricing (US): ・Monthly: $1.99 / 7-day trial ・Yearly: $24.99 / 14-day trial ・Lifetime: $69.99 (one-time) Local prices appear in-app. Cancel at least 24 hours before the trial ends to avoid renewal. Manage: Settings > Apple ID > Subscriptions. Terms: https://do-dodo.com/memox/terms Privacy: https://do-dodo.com/memox/privacy Tokushoho (JP): https://do-dodo.com/memox/tokushoho Contact: memox.support@do-dodo.com

Screenshots

3sec Diary4 screens
Memox Journal4 screens

Verdict

The call

The clearest difference is update cadence: Memox Journal at every 2 months against 3sec Diary's every 26 months. 3sec Diary's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, ads and in-app purchases 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. 3sec Diary sells 1 one-off in-app purchase and Memox Journal sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

3sec Diary ships an update every 26 months, Memox Journal every 2 months. The most recent releases landed on November 1, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 5 level
3sec Diary versus Memox Journal: the parameters behind the verdict, then further details
Parameter3sec DiaryMemox Journal
PriceFreeFree
Positive reviews60.0% of reviews—
Update frequencyEvery 26 monthsEvery 2 months — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better16.0
Further details — not scored
Size12 MB7 MB
Age rating4+4+
DeveloperKENJI KANEMOTOAkira Kamada

In-app purchases

1 purchases

3sec Diary

One-time1
  • Eliminate Ads$0.99
3 purchases

Memox Journal

Subscriptions2
  • Memox Plus Monthly7 Days trial$1.991 Month
  • Memox Plus Yearly14 Days trial$24.991 Year
One-time1
  • Memox Plus Lifetime$69.99

Questions

Is 3sec Diary free?
3sec Diary is free to download, with in-app purchases available.
Is Memox Journal free?
Memox Journal is free to download, with in-app purchases available.
Do 3sec Diary or Memox Journal have ads?
Both 3sec Diary and Memox Journal show ads.
Which is updated more often, 3sec Diary or Memox Journal?
3sec Diary ships an update every 26 months, and Memox Journal every 2 months. Most recently, 3sec Diary was updated on November 1, 2026 and Memox Journal on November 9, 2026.

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