Secret Diary vs Ullam
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Secret Diary
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Secret Diary is the diary only you can open. Write a few honest lines, add a photo, pick a mood, and keep it all behind Face ID. Free to download. Your journal is free; Premium unlocks extra tools. FREE, WITH NO ENTRY LIMIT - Unlimited daily entries with text, a photo, mood, place and weather - Face ID, Touch ID or passcode lock, with entries hidden in the app switcher - Calendar, timeline, search and favorites - A daily writing prompt and a gentle daily reminder - On This Day, streaks, achievements, basic stats and your year in pixels - Home Screen, Lock Screen and StandBy widgets that never show your words - Apple Watch app: log a mood or dictate a quick note, and it's added to that day's entry on your iPhone - Siri and Shortcuts: add an entry, log a mood or check your streak - Password-protected backups (AES-256) that restore on any device PREMIUM, WHEN YOU WANT MORE - Decoy Mode: open to a working calculator, notes or weather screen; only your secret code reveals the diary - Private iCloud sync between your iPhone and iPad - Voice notes, transcribed on your device where supported - Dream journal with symbols and tags - Time capsules: letters to your future self, sealed until the day you choose - Mood insights, trends and Year Wrapped - Seven more themes, two more journal fonts and alternate app icons - The full prompt library and entry templates - A printable PDF photo book of your entries and photos If Premium ends, nothing you made is taken away. You keep writing for free, voice notes, dreams and time capsules stay readable and are included in backups, Decoy Mode keeps protecting your diary until you turn it off, and premium themes switch back to the free look. PRIVATE BY DESIGN - No account, no sign-up, no email address - No ads, no analytics SDKs and no tracking - Your journal stays on your device, or in your own private iCloud if you turn on sync - Photos are saved without location data - The developer runs no server and can't read what you write PREMIUM PRICING Premium is optional. Premium Monthly is $2.99 a month and Premium Yearly is $19.99 a year, each with a 7-day free trial for eligible new subscribers. Premium Lifetime is a one-time purchase of $49.99. Prices are in US dollars and vary by region. Payment is charged to your Apple Account when you confirm the purchase, or when a free trial ends. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings. Terms of Use: https://secretdiary.duttlabs.app/terms.html Privacy Policy: https://secretdiary.duttlabs.app/privacy.html Support & FAQ: https://secretdiary.duttlabs.app/support.html Questions or ideas? Email shankarduttsgd@gmail.com. Every message is read by the developer.
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 iPhone and synced only through your own iCloud. WRITE WITHOUT WORRY ⢠Beautiful, distraction-free editor with rich text, photos and your own emojis ⢠A warm day/night theme that follows the time of day ⢠Color-code each entry by mood, and tag it with a category PRIVATE BY DESIGN ⢠Lock any diary with its own PIN ā locked diaries are encrypted with AES-256, using a key derived from your PIN ⢠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 iPhone's built-in data protection and stays on your device or in your personal iCloud. We never see it. FIND ANY MEMORY ⢠Calendar view of your month, with mood at a glance ⢠Filter the calendar by category to instantly find what you wrote ⢠Track your writing streak and daily word goal ⢠Home & Lock Screen widgets: streak, mood, daily goal and a fresh writing prompt OWN YOUR DATA ⢠Start faster with templates: Gratitude, Daily Review, Travel Log, Dream and Goals ⢠Export an encrypted backup protected by a password only you know, and restore it on this or a new device ⢠Share any single entry as Markdown ⢠Moving from Day One? Import your JSON export, photos and tags included ā or a folder of Markdown or text notes 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. 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 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. Start writing today. Your story is worth keeping ā privately. 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 update cadence: Ullam at fortnightly against Secret Diary's every 4 months. On price, ads, in-app purchases and device support 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. Secret Diary sells 3 in-app purchases, starting at $2.99 per month and Ullam sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Secret Diary ships an update every 4 months, Ullam fortnightly. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.
| Parameter | Secret Diary | Ullam |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Fortnightly ā better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Mac |
| Requires iOS | 17.0 ā better | 18.0 |
| Further details ā not scored | ||
| Size | 14 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Shankar Dutt | Kaspar Works, LLC |
In-app purchases
Secret Diary
- Premium Monthly7 Days trial$2.991 Month
- Premium Yearly7 Days trial$19.991 Year
- Premium Lifetime$49.99
Ullam
- Ullam Premium7 Days trial$1.991 Month
- Ullam Premium7 Days trial$14.991 Year
- Ullam Premium Lifetime$29.99









