Murmur vs Oto Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Murmur
This app allows you to record your daily thoughts and feelings using your voice. An AI companion listens, transcribes your words, and provides a warm reply. It offers mood tracking, a daily question prompt, and a yearly recap of your entries.
- Voice recording and transcription
- AI companion replies
- Emotion analysis and mood tracking
- Daily question prompts
- Home screen widgets
- Yearly recap
- App lock and cloud backup
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How was your day today? Some moments are hard to write down, but easy to say. Murmur is a private AI voice diary that captures your day in your own voice. Speak your thoughts, feelings, and stories — and an AI companion quietly listens and writes back. ■ Just Speak, It Becomes a Diary Tap a date on the calendar or press the + button to start recording. Pick one of five emotions and tell the story of your day. You can customize the emotions to fit you. ■ An AI Companion That Writes Back When you save an entry, AI listens to your voice, reads the emotion in it, and leaves you a warm reply. Comfort on hard days, shared joy on good ones. ■ Voice to Text, Feelings to Insights Your words are transcribed automatically, with a summary, keywords, and emotion analysis. The monthly report shows how your mood flowed through the month. ■ Question of the Day On days you don't know what to say, a fresh daily question opens the conversation. It can even remember yesterday's story and ask what happened next. ■ Warmth Streak The more consistently you record, the more warmth you build. Murmur helps your daily reflection become a habit. ■ Widgets on Your Home Screen See this month's moods at a glance with the emotion calendar widget. ■ Your Year, Wrapped At the end of the year, Murmur gathers your voices and emotions into a personal recap. Turn favorite moments into emotion cards and share them with friends. ■ Private and Safe Protect your space with app lock (PIN and biometrics), and keep your entries safe across devices with cloud backup. ■ Murmur Premium - Recording time 10 → 20 minutes - AI emotion analysis, summary & keywords - Replies from your AI companion - Photo attachments & monthly report - Cloud backup - No ads Your voice is your most honest diary. Start telling your story today.
Oto Diary
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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
Verdict
The clearest difference is ads: Oto Diary at none against Murmur's shown. Murmur's advantage is update cadence (weekly 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
Both are free to download. Murmur sells 4 in-app purchases, starting at $2.99 per month and Oto Diary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Murmur ships an update weekly, Oto Diary every 6 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Murmur | Oto Diary |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (82 ratings) — better | — |
| Positive reviews | 61.4% of reviews | — |
| Number of ratings | 82 — better | — |
| Update frequency | Weekly — better | Every 6 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 84 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Junhyeok Heo | torankirite |
In-app purchases
Murmur
- Monthly Subscription Pass$2.991 Month
- Yearly Subscription Pass$29.991 Year
- Server Synchronization$0.99
- Remove Ads$1.99
Oto Diary
- Sound Diary Premium$3.99









