Locked Secrets Diary vs Ullam
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Locked Secrets Diary
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The diary that never reveals the truth. Most diary apps protect your notes until someone asks you to unlock them. Locked Secrets Diary is different. It never tells anyone whether a PIN is right or wrong. Enter your real PIN and you'll see your private diary. Enter any other PIN and the app opens normally - without warnings, error messages, or suspicious behavior. It simply shows the diary for that PIN, whether that's an empty vault or convincing decoy entries you've prepared. Only you know which PIN unlocks your real life. Privacy designed for the real world. Sometimes privacy isn't about hackers. It's about moments when someone asks, expects, or pressures you to unlock your phone. Locked Secrets Diary gives you something ordinary diary apps cannot: plausible deniability. ⢠Your real PIN opens your private journal ⢠Every other PIN is also accepted ⢠The app never displays "Incorrect PIN" ⢠There are no warning messages ⢠There is no clue that another, more private diary exists If someone asks for your PIN, you can provide a different one. The app behaves exactly the same, showing only the entries associated with that PIN. The truth remains yours alone. Even we can't read your private entries. Your secret diary is encrypted before it ever leaves your device, making it unreadable to anyone except you. Security that works when it matters. Your privacy should never depend on remembering to hide your screen. That's why Locked Secrets Diary includes thoughtful protections built for everyday life: ⢠Every PIN creates its own completely separate encrypted diary ⢠One-tap Instant Exit immediately leaves Secret Mode and returns to your regular diary ⢠Automatic lock after 30 seconds of inactivity ⢠Face ID and Touch ID support for fast, secure access ⢠Private entries remain isolated from your everyday journal ⢠Multiple secure vaults for different levels of privacy Your everyday diary - plus your private one. Locked Secrets Diary isn't only about security. It's also a beautiful journal you'll enjoy using every day. Record daily moments, organize thoughts with tags, track your mood, browse your memories in calendar view, and quickly search past entries. Use your regular diary for everyday life while keeping your most personal thoughts protected inside your private vault. Available wherever you are Your diary travels with you ⢠Secure sync across your devices ⢠Works offline whenever inspiration strikes ⢠Changes sync automatically when you're back online ⢠Sign in easily with Apple or Google Whether you're at home, traveling, or away from an internet connection, your journal is always available. Built for peace of mind. Privacy isn't just about encryption. It's about feeling safe enough to write honestly. Whether you're protecting deeply personal thoughts, keeping a private journal while traveling, separating work and personal reflections, or simply valuing your own space, Locked Secrets Diary helps ensure your most important thoughts stay yours. Because true privacy isn't proving you have secrets. It's making sure nobody can tell. Download Locked Secrets Diary today and experience a diary designed for the real world - where every PIN looks right, and only you know which one tells the truth.
Ullam
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Ullam is a calm, private diary for your daily thoughts. No account, no tracking, no servers reading your life ā your journal is stored on your device and synced only through your own iCloud. WRITE WITHOUT WORRY ⢠A soft, warm design: cream paper, a pastel color for each mood, and distraction-free writing with rich text, photos and your own emojis ⢠Write freely, or switch to a guided reflection with a gentle question to start from ⢠A one-tap mood check-in for the day, shown across your calendar ⢠Quick Entry: jot a thought in seconds and choose the diary it goes into ⢠Drafts are saved as you type and come back after an interruption, encrypted on this device ⢠Entry history: look back at earlier versions of an entry and restore one ⢠Color-code each entry by mood, and tag it with a category PRIVATE BY DESIGN ⢠Lock any diary with its own PIN or a longer passphrase ā locked diaries are encrypted with AES-256, using a key derived slowly from your secret so guesses take real time ⢠Too many wrong tries and Ullam makes you wait before trying again ⢠Face ID / Touch ID unlocks the app; every hidden diary always asks for its PIN ⢠Hidden diaries stay out of your main list and never open without their own PIN ⢠Everything else is protected by your device's built-in data protection and stays on your device or in your personal iCloud. We never see it. ON YOUR WRIST AND HOME SCREEN ⢠Apple Watch app: check in with your mood, capture a quick thought, or record a voice note that waits safely and arrives on your iPhone ⢠Home Screen and Lock Screen widgets for your daily question, streak and quick actions ⢠Widgets show no entry text unless you choose to allow it, and never anything from a locked diary FIND ANY MEMORY ⢠Calendar view of your month, with mood at a glance ⢠Search across your diaries by words, dates, moods and media ⢠On This Day brings back what you wrote in earlier years ⢠Track your writing streak and daily word goal BRING YOUR DAY IN ⢠Journaling Suggestions on iPhone: pick a moment from your day ā photos, places, music, workouts ā and Ullam adds it to your entry. Only what you choose is shared with Ullam. ⢠Optionally save each day's mood to Apple Health as State of Mind. Ullam never reads your Health data, and moods in PIN-locked diaries stay in Ullam. OWN YOUR DATA ⢠Moving from Day One? Import your JSON export, photos and tags included ā or a folder of Markdown or text notes ⢠Export an encrypted backup protected by a password only you know, and restore it on this or a new device ⢠Templates for gratitude, daily review, travel, dreams and goals ON-DEVICE AI (PREMIUM) ⢠A writing assistant that helps you continue, rephrase or reflect, plus tag suggestions ā running entirely on your device ⢠Requires an iPhone that supports Apple Intelligence, on iOS 26 or later FREE & PREMIUM Ullam is free for up to 10 notes, with multiple and hidden diaries, iCloud sync, widgets, the Watch app and mood insights included. Ullam Premium unlocks unlimited notes, the on-device AI writing assistant, your own templates and PDF export. Choose yearly ($14.99/year) or monthly ($1.99/month), each with a 7-day free trial, or buy Lifetime once for $29.99 ā no subscription. Privacy Policy: https://kaspar.works/ullam/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Locked Secrets Diary at none against Ullam's 3. Locked Secrets Diary also leads on update cadence (every 4 days vs every 2 weeks). Ullam's advantage is device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Ullam sells 3 in-app purchases, starting at $1.99 per month. Locked Secrets Diary asks for nothing beyond the download.
Locked Secrets Diary ships an update every 4 days, Ullam every 2 weeks. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.
| Parameter | Locked Secrets Diary | Ullam |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days ā better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, Mac, Apple Watch ā better |
| Requires iOS | 17.6 ā better | 18.0 |
| Further details ā not scored | ||
| Size | 14 MB | 12 MB |
| Age rating | 9+ | 4+ |
| Developer | Roman Rudych | Kaspar Works, LLC |
In-app purchases
Locked Secrets Diary
No in-app purchases
Ullam
- Ullam Premium7 Days trial$1.991 Month
- Ullam Premium7 Days trial$14.991 Year
- Ullam Premium Lifetime$29.99








