Comparison

KTrunk vs Secret Notes

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

Head to head
About

KTrunk

This note-taking app allows you to save ideas with attached files and photos. You can create links between notes and files, and synchronize your data across devices. An optional in-app purchase enables note encryption for enhanced privacy.

Highlights
  • Save ideas with files and photos
  • Link notes to other notes and files
  • Synchronize across devices via iCloud
  • Notes saved in HTML format
  • Optional note encryption
Features
Read full description

Knowledge Trunk - or short KTrunk - is a note taking App. Use KTrunk to save all your ideas augmented with related files and photos. You can establish links from one note to any other note or file in KTrunk. The notes are saved in html-format and can be synchronized across your devices using iCloud. In-App-Purchases: * Privacy Allows to encrypt/decrypt your notes.

About

Secret Notes

Features
Read full description

Secret Notes is the private notepad for everything that’s nobody else’s business: thoughts, lists, plans, recordings. No account, no tracking, no ads — your notes stay on your device, encrypted and behind PIN or Face ID. PRIVACY FIRST • App lock with PIN or Face ID, auto-locking after a timeout you choose • Note contents are stored encrypted on your device (AES-256) • Lock individual notes — content only shows after re-authenticating • No account required, no data collection, no ads SEVEN NOTE TYPES • Text with formatting (bold, italic, colors) and [[links]] between notes • Checklists with sub-items and smart auto-checking • Spreadsheets, Markdown, audio and video notes, tally counters ORGANIZE & FIND • Categories, nested folders, colors, pinning, ratings • Search and filters, custom sort by drag & drop • Reminders — including recurring — with an overview screen • “At a Glance” home screen, archive, and trash with auto-cleanup • Templates for recurring notes BACK UP & SYNC • Encrypted backups, portable between devices • Cloud backup and multi-device sync via your own server (Nextcloud/WebDAV) — your data lives only where you decide • Direct device-to-device transfer on your local network EVERYDAY EXTRAS • Widgets: quick add and recently edited notes • Share sheet: save text, links, images and files from other apps • Read notes aloud • Fully localized in English and German FREE & PRO Text, checklist and tally notes, app lock, note lock, categories, reminders and widgets are free. Secret Notes Pro (one-time purchase, no subscription) unlocks spreadsheets, Markdown, audio/video, folders, attachments, note history, PDF export, backups and device sync.

Screenshots

KTrunk1 screens
Secret Notes4 screens

Verdict

The call

The clearest difference is update cadence: Secret Notes at every 3 days against KTrunk's monthly. KTrunk's advantage is iOS requirement (18.0 vs 26.2). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KTrunk sells 3 one-off in-app purchases and Secret Notes sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

KTrunk ships an update monthly, Secret Notes every 3 days. The most recent releases landed on September 29, 2026 and September 28, 2026 respectively.

Scorecard2 real differences · 8 level
KTrunk versus Secret Notes: the parameters behind the verdict, then further details
ParameterKTrunkSecret Notes
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings2 — better—
Update frequencyMonthlyEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS18.0 — better26.2
Further details — not scored
Size10 MB4 MB
Age rating17+4+
DeveloperClemens SchuetzdellerAndreas Grauf

In-app purchases

3 purchases

KTrunk

One-time3
  • Operating Convenience$0.99
  • Privacy$1.99
  • #Tag-Proposals$1.99
1 purchases

Secret Notes

One-time1
  • Secret Notes Pro$2.99

Questions

Is KTrunk free?
KTrunk is free to download, with in-app purchases available.
Is Secret Notes free?
Secret Notes is free to download, with in-app purchases available.
Do KTrunk or Secret Notes have ads?
Neither KTrunk nor Secret Notes shows ads.
Which is updated more often, KTrunk or Secret Notes?
KTrunk ships an update monthly, and Secret Notes every 3 days. Most recently, KTrunk was updated on September 29, 2026 and Secret Notes on September 28, 2026.

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