SumDU vs hYYa Encrypted Notes & Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SumDU
Access your university schedule, including classes, professors, and rooms, all in one convenient app. Download your schedule for offline use and sync it with your device's calendar to avoid missing appointments.
- University schedule access
- Professor and auditorium schedules
- Offline schedule download
- Calendar integration
- Schedule for all groups
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Are you working or studying at Sumy State University? This app will be your saviour! Schedule for all professors, groups and auditoriums in one place. Download schedule for all groups, professors and auditoriums you need and use it offline. Add schedule directly to Calendar app and don't be late for your class!
hYYa Encrypted Notes & Sync
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Sync your notes on all your devices through your own iCloud or Google Drive. Every note is encrypted before it leaves your device. Encrypted notes that only you can read. hYYa Encrypted Notes is a private notepad, diary and journal for iPhone, iPad and Mac. Every note is encrypted on your device before it is saved. There is no hYYa account to create and no hYYa server to hold a copy, so your notes stay yours alone. Your notes. Your iCloud. Your Google Drive. FOR YOUR EYES ONLY • Encrypted on your device, so only you can read your notes. • Titles and folder names stay private too, not just what you write. • Opens with Face ID or Touch ID. • Find anything in seconds, and your notes stay private while you search. SYNC ON ALL YOUR DEVICES • Through your own iCloud Drive, across your iPhone, iPad and Mac. • Through your own Google Drive too, to reach your other devices. Only you can read what's there. • Or keep your notes on this device only. Writing, search and export all work offline. • Edits from two devices are merged back together, and if a note changes in two places at once, both versions are kept. Nothing you typed is ever silently discarded. WRITE THE WAY YOU THINK • Headings, bold, lists and checklists appear as you type. • Folders, pinned notes and colour labels. • Write in any language: Arabic paragraphs read right-to-left and English ones left-to-right, in the same note. • Attach pictures and files. Pictures show inside the note; PDFs and other files open with a tap on iPhone and iPad, or in your usual app on Mac. Every attachment is encrypted exactly like the words around it. YOUR WRITING STAYS PORTABLE • Export every note as plain Markdown, with its pictures and files beside it, whenever you like, for free. • Import from Markdown, plain text, HTML, RTF or an Evernote export. • No ads. No tracking. Nothing watching what you write. MADE FOR IPHONE, IPAD AND MAC • Built for each device, so it feels right at home. • On Mac: a full menu bar, keyboard shortcuts, printing and a proper Settings window. • On iPad: your folders in a sidebar, and drag and drop to file a note. • Dynamic Type, VoiceOver, Reduce Motion, and light and dark themes. FREE, AND HONEST ABOUT IT Keep up to 2 notes free for as long as you like, with sync and every other feature, no time limit and no trial to run out. Encryption, biometric lock, import and export are free for everyone and always will be. One purchase unlocks unlimited notes on iPhone, iPad and Mac together. It is never a subscription, and nothing you have written is ever locked, hidden or taken away.
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Verdict
The clearest difference is in-app purchases: SumDU at none against hYYa Encrypted Notes & Sync's 1. SumDU also leads on iOS requirement (12.1 vs 26.0). hYYa Encrypted Notes & Sync's advantage is update cadence (every 4 days vs every 8 months). On price, ads and device support 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. hYYa Encrypted Notes & Sync sells 1 one-off in-app purchase. SumDU asks for nothing beyond the download.
SumDU ships an update every 8 months, hYYa Encrypted Notes & Sync every 4 days. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.
| Parameter | SumDU | hYYa Encrypted Notes & Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 8 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 14 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | App Dev Academy Ltd. | Hassaan Abdeen |
In-app purchases
SumDU
No in-app purchases
hYYa Encrypted Notes & Sync
- hYYa Encrypted Notes Pro$19.99
Questions
Is SumDU free?
Is hYYa Encrypted Notes & Sync free?
Do SumDU or hYYa Encrypted Notes & Sync have ads?
Which is updated more often, SumDU or hYYa Encrypted Notes & Sync?
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