Comparison

Lock Notes vs zInventory

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

Head to head
About

Lock Notes

Securely store private thoughts, passwords, and reminders with biometric authentication. Enjoy a simple, elegant interface with iCloud sync, customizable themes, and backup options. Your data remains private and encrypted.

Highlights
  • Biometric authentication (Face ID, Touch ID)
  • Encrypted note storage
  • iCloud sync across devices
  • Customizable themes and dark mode
  • Backup and restore functionality
  • Ad-free minimalist interface
Features
Read full description

Keep a personal notebook for your thoughts, diary entries, ideas and everyday lists. Lock Notes gives your writing its own space, with a passcode and supported biometric unlock to control access. WRITE THE WAY YOU THINK Give long notes structure with headings, bold and italic text, lists and checklists. Add photos directly into your writing, keep a simple journal, or capture an idea before it slips away. FIND WHAT MATTERS Search your notes and find text inside an open note. Automatic saving keeps your edits as you write and when you leave the editor. A clean layout keeps the focus on your text. TAKE YOUR WRITING WITH YOU Export notes as TXT or formatted PDF, share the notes you choose, and print a copy. Use exports for a personal archive, a draft to continue elsewhere, or a list to share. RECOVER AN ACCIDENTAL DELETION Recently Deleted keeps removed notes for up to 30 days, so you can restore one before it is permanently deleted. CHOOSE HOW YOU WORK Write with local storage, adjust the appearance, and use a light or dark interface. Optional cloud synchronization is available with Premium and a compatible cloud account. From a short memo to a longer personal journal, keep your writing easy to find and comfortable to read. - Privacy Policy: https://lykovstudio.io/privacy - Terms of Use: https://lykovstudio.io/terms

About

zInventory

Features
Read full description

zInventory is a mobile extension of zLinkFM Inventory Management System which allows the customers to create packing list against their orders. This app facilitates the Barcode scanning mechanism for the ease of creation of packing list.

Screenshots

Lock Notes4 screens
zInventory4 screens

Verdict

The call

The clearest difference is in-app purchases: zInventory at none against Lock Notes's 7. zInventory also leads on iOS requirement (11.0 vs 15.0). Lock Notes's advantage is update cadence (every 10 days vs every 7 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Lock Notes sells 7 in-app purchases, starting at $4.99 per 7 days. zInventory asks for nothing beyond the download.

UpkeepUpdate frequency

Lock Notes ships an update every 10 days, zInventory every 7 months. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

Scorecard3 real differences · 7 level
Lock Notes versus zInventory: the parameters behind the verdict, then further details
ParameterLock NoteszInventory
PriceFreeFree
Rating4.4 (138 ratings) — better—
Positive reviews54.2% of reviews—
Number of ratings138 — better—
Update frequencyEvery 10 days — betterEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.0 — better
Further details — not scored
Size23 MB16 MB
Age rating4+4+
DeveloperLYKOV STUDIO LTDzLink

In-app purchases

7 purchases

Lock Notes

Subscriptions5
  • Weekly$4.997 Days
  • Weekly3 Days trial$4.997 Days
  • Monthly$7.991 Month
Show 2 more
  • Annual$29.991 Year
  • Annual3 Days trial$29.991 Year
One-time2
  • Disable ads$0.99
  • Lifetime$39.99
None

zInventory

No in-app purchases

Questions

Is Lock Notes free?
Lock Notes is free to download, with in-app purchases available.
Is zInventory free?
zInventory is free to download, with no in-app purchases.
Do Lock Notes or zInventory have ads?
Neither Lock Notes nor zInventory shows ads.
Which is updated more often, Lock Notes or zInventory?
Lock Notes ships an update every 10 days, and zInventory every 7 months. Most recently, Lock Notes was updated on October 21, 2026 and zInventory on October 19, 2026.

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