Comparison

Oto Diary vs 16 Personalities Test

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

Head to head
About

Oto Diary

Read full description

Some moments can't be captured in a photo or a sentence. Oto Diary is an audio journal that keeps the sound of your day in as little as 10 seconds. Just press and hold the cassette reel. One year later, on the same day, that sound comes back to you as a Time Capsule. The more days you record, the more your calendar and Year view fill up with a year that's uniquely yours. ■ Features · Press and hold the reel to record (choose 10, 30 or 60 seconds and more, once a day) · Label each tape with a title and one of five moods: Calm, Happy, Tired, Tender, Wonder · Calendar: every recorded day gets a waveform. Tap a day to play it back · Year view: see all twelve months of your recordings at a glance · Time Capsule: a notification brings back the sound you recorded one year ago today · Not so long ago: replay what you recorded one week and one month ago, right in the Capsule tab · Favorites: keep your most precious recordings in one album · Streaks: see how many days in a row you've kept going · Daily reminder at the time you choose ■ Perfect for · Anyone who never managed to keep a written journal · Parents saving their kids' voices, pet owners, families · Capturing your commute, your travels, and the changing seasons in sound · Building a tiny 10-second daily habit · Keeping memories in a form that photos can't ■ Privacy · Every recording is stored on this device · No account needed. Your recordings are never uploaded to a server · The mic is used only while you hold the reel, with a recording light on screen · To introduce other apps by the same developer, the app may load public App Store information. Your recordings and entries are never sent

About

16 Personalities Test

Gain profound self-awareness and understand your psychological blueprint with a precision-engineered assessment. Uncover strengths, blind spots, and career growth opportunities with deep-dive analysis and rapid results. Save your history and share personality cards with friends.

Highlights
  • Precision personality assessment
  • Deep-dive analysis and insights
  • Rapid results and profile viewing
  • Personal test history archive
  • Social sharing of personality cards
  • Privacy-focused with no registration
  • Global language support
Features
Read full description

Discover your hidden potential. The 16 Personalities Test — from MB16 (Mind & Behavior 16) — is your ultimate companion for gaining profound self-awareness and understanding your unique psychological blueprint. Take our precision-engineered assessment to receive a comprehensive personality report. Uncover the nuances of your strengths, blind spots, natural talents, and career growth opportunities. Key Features • Precision Assessment: Rigorously updated questions for the most accurate results. • Deep-Dive Analysis: Rich, actionable insights into your personality archetype. • Rapid Results: Complete the test and view your profile in just minutes. • Clearly displays your personality type using all 16 combinations of I/E, S/N, T/F, and P/J. • Sleek UI/UX: A modern, elegant interface with seamless Light and Dark mode support. • Personal Archive: Track your journey by saving your full test history. • Social Sharing: Generate beautiful, shareable personality cards for your friends in one tap. • Privacy First: No registration or personal data required—start your journey immediately. • Global Support: Fully localized in English, Spanish, Hindi, Indonesian, Japanese, Korean, Brazilian Portuguese, Simplified Chinese, and Traditional Chinese. Why Choose This Test? • Self-Awareness: Develop a clearer understanding of your thoughts and behaviors. • Better Relationships: Master your communication style and connect deeply with others. • Career Clarity: Make informed decisions about your professional path and lifestyle. • Authentic Living: Unlock your full potential and live a life aligned with your values. • Explore the four iconic personality groups: Analysts (INTJ, INTP, ENTJ, ENTP), Diplomats (INFJ, INFP, ENFJ, ENFP), Sentinels (ISTJ, ISFJ, ESTJ, ESFJ), and Explorers (ISTP, ISFP, ESTP, ESFP). Whether you’re a student, a professional, or simply a curious soul, this app is your gateway to a more enlightened version of yourself. Download today and start your journey of self-discovery!

Screenshots

Oto Diary4 screens
16 Personalities Test4 screens

Verdict

The call

The clearest difference is ads: Oto Diary at none against 16 Personalities Test's shown. 16 Personalities Test's advantage is update cadence (every 3 days vs every 6 weeks). On price, in-app purchases, device support and iOS requirement 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. Oto Diary sells 1 one-off in-app purchase and 16 Personalities Test sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Oto Diary ships an update every 6 weeks, 16 Personalities Test every 3 days. Both last shipped on November 9, 2026.

Scorecard2 real differences · 8 level
Oto Diary versus 16 Personalities Test: the parameters behind the verdict, then further details
ParameterOto Diary16 Personalities Test
PriceFreeFree
Rating—2.0 (3 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 6 weeksEvery 3 days — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.6 — better
Further details — not scored
Size2 MB57 MB
Age rating4+12+
DevelopertorankiriteHo Yin Tsui

In-app purchases

1 purchases

Oto Diary

One-time1
  • Sound Diary Premium$3.99
4 purchases

16 Personalities Test

One-time4
  • Buy me a coffee$0.99
  • Buy me a pizza$1.99
  • Buy me lunch$2.99
Show 1 more
  • Lifetime PRO$4.99

Questions

Is Oto Diary free?
Oto Diary is free to download, with in-app purchases available.
Is 16 Personalities Test free?
16 Personalities Test is free to download, with in-app purchases available.
Do Oto Diary or 16 Personalities Test have ads?
16 Personalities Test shows ads; Oto Diary does not.
Which is updated more often, Oto Diary or 16 Personalities Test?
Oto Diary ships an update every 6 weeks, and 16 Personalities Test every 3 days. Most recently, Oto Diary was updated on November 9, 2026 and 16 Personalities Test on November 9, 2026.

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