Comparison

KTrunk vs ZattaMemo

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

ZattaMemo

Read full description

ZattaMemo is a memo app for jotting things down quickly — and rediscovering them through your home screen widget. ■ Jot It Down, That's All You Need Just type and save. No extra steps, no setup. Designed for the moment an idea hits — capture it before it slips away. ■ Rediscover with Widgets Add a widget to your home screen and your saved memos appear at random. Forgotten ideas and TODOs catch your eye when you least expect it. Available in small and medium sizes. Tap to jump straight to the full memo. With the upgrade, the widget can also show starred memos only, or filter by tag. ■ Organize Later with Hashtags Type #hashtags in your memo and they're automatically recognized as tags. Even the roughest notes become searchable and filterable after the fact. Six preset tags are included: Idea, TODO, Shopping, Work, Personal, and Later. Over time, your own tagging system takes shape naturally. ■ Export and Put Your Notes to Work Export your memos in plain text, CSV, or JSON format. Copy to clipboard or share to other apps. Paste into AI tools to sort, categorize, or brainstorm from your raw notes. Your quick scribbles become input for something bigger. ■ Export and Restore Export your memos as JSON, and import them back anytime. Useful for restoring data after reinstalling, or moving between devices. ■ More Features - Star important memos for quick access - Bulk actions: archive, restore, or delete multiple memos at once - Search by keyword or filter by tag - All data stays on your device — no server, no account, no tracking ■ Feature List - Create, edit, archive, and permanently delete memos - Tag system (auto-extracted hashtags) - Favorites (star) feature - Bulk operations (select, archive, restore, delete) - Keyword search and tag filter - Export (text / CSV / JSON) - Home screen widget (small and medium) - Jump to memo detail from widget - Widget filtering: starred only / by tag (Upgrade) - Unlimited memos (Upgrade) - Attach an image to your memos (Upgrade) - Add memos from the share sheet (Upgrade) — About the Upgrade — All core features are free. A one-time (non-subscription) upgrade unlocks unlimited memos, widget filtering (starred / tag), image attachments, and adding memos from the share sheet. Note: ZattaMemoLite has been renamed to ZattaMemo. Same app, same data. Jot it down, rediscover later. A simple memo app that's just right.

Screenshots

KTrunk1 screens
ZattaMemo4 screens

Verdict

The call

KTrunk and ZattaMemo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 ZattaMemo 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, ZattaMemo every 3 weeks. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

ScorecardNo meaningful differences
KTrunk versus ZattaMemo: the parameters behind the verdict, then further details
ParameterKTrunkZattaMemo
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings2 — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.017.0 — better
Further details — not scored
Size10 MB3 MB
Age rating17+4+
DeveloperClemens SchuetzdellerTatsuyoshi Sasaki

In-app purchases

3 purchases

KTrunk

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

ZattaMemo

One-time1
  • ZattaMemo Upgrade$3.99

Questions

Is KTrunk free?
KTrunk is free to download, with in-app purchases available.
Is ZattaMemo free?
ZattaMemo is free to download, with in-app purchases available.
Do KTrunk or ZattaMemo have ads?
Neither KTrunk nor ZattaMemo shows ads.
Which is updated more often, KTrunk or ZattaMemo?
KTrunk ships an update monthly, and ZattaMemo every 3 weeks. Most recently, KTrunk was updated on October 14, 2026 and ZattaMemo on October 13, 2026.

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