Comparison

Vibe Alarm vs Oto Diary

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

Head to head
About

Vibe Alarm

Features
Read full description

*Silent time notifications with vibration! From wake-up alarms to timers - completely silent* Safe to use anywhere sound isn’t allowed. This innovative vibration app tells the time using only vibration patterns. Napping on trains, study timers in libraries, early morning wake-ups, focused work sessions… there are countless situations where sound isn’t an option. Wouldn’t it be great to be notified without disturbing anyone? To spend your time comfortably without worrying about your surroundings? ‘Vibe Alarm’ notifies you using only vibration patterns—no sound at all. A gentle companion that quietly supports your time management. Whether it’s a quiet night or a busy day, it will let you know “it’s time!” with just a vibration. ■Features & Benefits 1. Simple and Reliable Vibration Notifications Choose from strong to gentle vibration patterns. Completely silent design ensures you’ll never miss an alert. 2. Precise Time Settings – Second-Level Customization Set your timers down to the exact second. Whether 2 minutes 30 seconds for instant ramen or 25 minutes for a Pomodoro session, set your ideal time precisely. 3. Save Your Favorite Timers Save frequently used time settings as favorites. Launch 25-minute or 30-minute timers with just one tap. 4. Quick Start from Home Screen – Widget Support Two types of widgets: “History” and “Favorites.” Start past or favorite timer settings directly from the home screen. Instant access without opening the app. 5. Eye-Friendly Dark Mode Works comfortably in the dark. Ideal for late-night wake-ups or bedroom use, gentle on your eyes. 6. Auto Screen Off with Proximity Sensor Screen turns off automatically when the proximity sensor detects it. Vibration continues, saving battery, and safe to use in dark rooms. 7. Background Notifications Even if the app is closed, it will reliably alert you at the set time. Manage your time while using other apps. 8. Customizable Notification Count Set notifications from 1 to 50 times. Use more for important events, fewer for lighter tasks. ■Situations Where This App Excels 1. Transportation & Travel ・Prevent oversleeping on trains or buses ・Long-distance trips on bullet trains and planes ・Short naps in taxis ・Pre-driving naps (in parking lots, etc.) 2. Study & Focused Work ・Library or study room timers (25, 30, 60 minutes) ・Pomodoro technique sessions ・Time management for focused work ・Reading sessions ・Break intervals for memorization or review 3. Work & Office ・Power naps during lunch ・End times for meetings or conferences ・Short breaks in the office ・Time intervals for presentation prep or document creation 4. Home & Private Life ・Early morning/late night wake-ups without disturbing family ・Households with babies ・Hospital or nursing facility visits 5. Exercise & Health ・Interval training at the gym ・Yoga or meditation sessions ・Stretching or exercise breaks ・Walking or jogging time management 6. Special Situations ・For those with hearing considerations ・Work in noisy environments ・Caregiving or nursing time management ・Pet care timers ■Recommended For Commuters or students who often oversleep on trains (need silent but reliable wake-up) Night-shift workers who nap during the day without waking family Students who want quiet library timers to stay focused Users practicing Pomodoro in silent environments Users with hearing concerns who want reliable vibration alerts

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

Screenshots

Vibe Alarm4 screens
Oto Diary4 screens

Verdict

The call

The clearest difference is ads: Oto Diary at none against Vibe Alarm's shown. Vibe Alarm's advantage is update cadence (every 4 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. Vibe Alarm sells 1 one-off in-app purchase and Oto Diary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Vibe Alarm ships an update every 4 days, Oto Diary every 6 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 4 level
Vibe Alarm versus Oto Diary: the parameters behind the verdict, then further details
ParameterVibe AlarmOto Diary
PriceFreeFree
Update frequencyEvery 4 days — betterEvery 6 weeks
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size9 MB2 MB
Age rating4+4+
DeveloperKosuke Shimadatorankirite

In-app purchases

1 purchases

Vibe Alarm

One-time1
  • Remove Ads$2.99
1 purchases

Oto Diary

One-time1
  • Sound Diary Premium$3.99

Questions

Is Vibe Alarm free?
Vibe Alarm is free to download, with in-app purchases available.
Is Oto Diary free?
Oto Diary is free to download, with in-app purchases available.
Do Vibe Alarm or Oto Diary have ads?
Vibe Alarm shows ads; Oto Diary does not.
Which is updated more often, Vibe Alarm or Oto Diary?
Vibe Alarm ships an update every 4 days, and Oto Diary every 6 weeks. Most recently, Vibe Alarm was updated on October 28, 2026 and Oto Diary on October 31, 2026.

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