Comparison

O3Z vs QR Code Generator Maker

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

Head to head
About

O3Z

Read full description

Via BLE technology (Bluetooth Low Energy), this app allows to connect and use the ozone generator O3Z-Tech to monitor the sanitisation and download the sanitisation report.

About

QR Code Generator Maker

Quickly create custom QR codes for various information like links, Wi-Fi details, or contact cards. Personalize the appearance with colors and logos, and save or share them instantly. No account or sign-up required for basic use.

Highlights
  • Create QR codes for links, Wi-Fi, contacts, and events
  • Customize colors and add logos
  • Save and edit past QR codes
  • Export codes in various sizes
  • No account or sign-up required for basic use
  • Offline code generation
Features
Read full description

You needed that QR code five minutes ago. The Wi-Fi password is on a sticky note, the printer is warming up, and the guests are at the door. QR Generator turns whatever you need to share — a link, a Wi-Fi network, your contact card, an event — into a clean, scannable code in a few taps. No accounts. No watermarks. No "sign up to download." Just type what you want to share, pick a look that matches your brand, and save or share the result. WHAT YOU CAN TURN INTO A QR CODE - Website links and plain text - Wi-Fi networks guests can join without typing the password - Contact cards with multiple phones, emails, and websites - Email, phone, and SMS shortcuts that open ready to send - Map locations and calendar events - Anything you'd otherwise have to spell out loud MAKE IT LOOK LIKE YOURS - Pick any foreground and background color - Start from a curated set of presets if you'd rather not fiddle - Drop your logo in the center, with circle, square, or rounded shape - Adjust margins so it fits cleanly on a card, sign, or slide - Export at the size you actually need for print or screen BUILT FOR REAL LIFE - Cafés and restaurants putting menus and Wi-Fi on the table - Realtors leaving listing links on yard signs - Teachers handing out assignment links without typos - Event hosts swapping contact info without "what's your number again" - Small business owners printing flyers, business cards, and packaging - Anyone tired of reading a URL out loud twice SAVED, EDITABLE, AND READY NEXT TIME Every code you make lands in your history. Reopen it later, tweak the link or the colors, and re-export — no rebuilding from scratch. PRO A free QR Generator covers website links with basic styling. Pro unlocks the rest: - All nine QR code types - Full color and preset customization - Logo embedding - Full history access and editing - Available as an auto-renewing subscription or a one-time lifetime payment. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. WORKS WHERE YOU DO - iPhone and iPad, with a layout tuned for both - Localized in 38 languages - Generates codes on-device — no internet required to make one Stop spelling URLs out loud. Stop reading Wi-Fi passwords across the room. Make a QR code, hand someone a phone camera, and move on with your day. Download QR Generator and share anything in two taps. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

O3Z4 screens
QR Code Generator Maker4 screens

Verdict

The call

The clearest difference is in-app purchases: O3Z at none against QR Code Generator Maker's 4. O3Z also leads on iOS requirement (13.0 vs 17.0). QR Code Generator Maker's advantage is update cadence (every 10 days vs every 4 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. QR Code Generator Maker sells 4 in-app purchases, starting at $1.99 per 7 days. O3Z asks for nothing beyond the download.

UpkeepUpdate frequency

O3Z ships an update every 4 months, QR Code Generator Maker every 10 days. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 6 level
O3Z versus QR Code Generator Maker: the parameters behind the verdict, then further details
ParameterO3ZQR Code Generator Maker
PriceFreeFree
Rating—5.0 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 4 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size4 MB12 MB
Age rating4+4+
DeveloperSTEM s.r.l.Mobile Card Games & Travel Apps LLC

In-app purchases

None

O3Z

No in-app purchases

4 purchases

QR Code Generator Maker

Subscriptions2
  • QR Code Generator - Weekly$1.997 Days
  • QR Code Generator - Annual$9.991 Year
One-time2
  • QR Code Generator - Lifetime$9.99
  • QR Code Generator - Lifetime$14.99

Questions

Is O3Z free?
O3Z is free to download, with no in-app purchases.
Is QR Code Generator Maker free?
QR Code Generator Maker is free to download, with in-app purchases available.
Do O3Z or QR Code Generator Maker have ads?
Neither O3Z nor QR Code Generator Maker shows ads.
Which is updated more often, O3Z or QR Code Generator Maker?
O3Z ships an update every 4 months, and QR Code Generator Maker every 10 days. Most recently, O3Z was updated on October 17, 2026 and QR Code Generator Maker on October 15, 2026.

Other comparisons