Comparison

Stackby vs QuantumShelf

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

Head to head
About

Stackby

This app provides a flexible database platform to organize any type of information, from customer leads to project tasks and marketing campaigns. It allows real-time creation, management, and collaboration on databases from any mobile device, offering over 300 pre-built templates for quick setup.

Highlights
  • Organize information
  • Manage tasks and projects
  • Manage marketing campaigns
  • Real-time collaboration
  • 300+ pre-built templates
  • Cross-platform accessibility
Features
Read full description

Stackby is a flexible, easy to use database platform for you to organize anything. From agencies to freelancers to content creators to SMBs, over 3500 teams use Stackby to plan, manage and automate their work, their way. With Stackby on iOS, you can now get the power of Stackby right on your fingertips. All your databases in the web, are now automatically accessible on mobile. Now you can create, manage and collaborate with your teams, from anywhere you are - all in real-time. Some of the use-cases of Stackby today - --> Organizing information - - Leads & Customers - Sales CRM - Personal CRM - Recruitment CRM - Business Development - Applicant Tracking - Volunteer Management - Product - Bugs, Issues, Launches & Roadmap - Media lists --> Manage tasks and projects - - Task Planning - Client based Project Planning - Goal Tracking - OKR Tracker - Project Portfolio Management - Project Resource Management - Simple Project Tracker --> Manage your Marketing campaigns - Campaign Management - Social Media Calendar - Content Planning - Content Calendar - Video Production Management - Blog Editorial - PR Management - SEO Tracking - On-page, Off-page, SEO Audit - Ad Campaign Management - Reporting Analytics - Google Analytics, Search Console Choose from one of the 300+ pre-built templates across categories, and get started in less than 2 minutes. Download it on your mobile and tablets and seamlessly work across different platforms - web, desktop, mobile and tablet or iPad. Make way for endless possibilities.

About

QuantumShelf

Features
Read full description

Know what you have. Share what you need. Never run out again. QuantumShelf turns your camera into a data-entry clerk. Photograph a package, a receipt, a recipe or a handwritten list, and AI pulls out names, brands, quantities, prices, barcodes and expiration dates for you. Then it keeps track, reminds you before things expire, tells you where things are, and plans what to do with what you have — across iPhone, iPad and Apple Watch, with one inventory for the whole house. POINT THE CAMERA, SKIP THE KEYBOARD • Package scan: name, brand, barcode, expiration date, nutrition and allergens from a photo • Receipt scan: one photo adds 50+ items with quantities, prices and store name • Recipe and shopping-list scan from a photo, or paste a recipe link • AI is powered by Google Gemini and runs on a secure server PLAN WITH AI Ask for "a 5-day dinner plan using only what I have" or "an oil change on my truck." QuantumShelf builds ready-to-go projects from your inventory: recipes, the parts and tools you need, step-by-step tasks, and what you're missing. Part numbers appear only when the AI is confident — check them before you buy. Or just ask: "where's the WD-40?" or "what display cables do I have?" It finds things by what they are, not how you typed them, and tells you where each one lives. NOTHING SPOILS UNNOTICED • A daily reminder at the time you pick lists what's expiring soon • Low-stock and project due-date reminders, each on or off independently • Color-coded freshness and batch tracking — multiple expiration dates per item • Drop below a minimum and it lands on the shopping list automatically MAKE YOUR SHELVES SCANNABLE • Barcode lookup with check-digit correction for scuffed labels • Multi-barcode multipliers — scan the can, add one; scan the 6-pack, add six • Printable 50 × 30 mm QR labels for items, locations and batches • NFC tags on iPhone: tag a bin, tap to open it ORGANIZE IT THE WAY YOU STORE IT • Nested locations — Kitchen → Pantry → Top Shelf — with rolled-up counts • 94 built-in categories, custom fields (text, notes, number, date, on/off), and unit conversion across cups, grams and counts PROJECTS AND RECIPES • Nested checklists, parts and tools checked against what's on hand, shortfalls sent to your shopping list • Reset a project to run a repeat job again, like the next oil change • Browse and edit every recipe — fix anything a scan got wrong ONE INVENTORY, WHOLE HOUSEHOLD • Invite with a code or a link; four permission levels including read-only, with a full audit trail • Check items out and in — know who has the drill • Conflict resolution when two people edit the same item PAPERWORK AND YOUR DATA • Seven PDF reports, including insurance documentation and expenses • Import and export JSON, CSV, Markdown and PDF — lists round-trip with your notes app • Offline-first, full backup and restore, and Dropbox backup to your own account • Cloud sync on every tier, including free EVERY APPLE DEVICE YOU OWN • Apple Watch app with a complication: shopping list by store, what's expiring, quick quantity changes • Ten Siri shortcuts: add to the list, find an item, check what's expiring or low • iPad-optimized layouts FREE, PRO AND FAMILY Free covers 50 items, 4 storage locations and 5 AI actions a week, with cloud sync. Pro removes every limit. Family lifts the item and location limits for a whole household of up to six people, with unlimited AI for the subscriber. Terms of Use: https://quantumshelf.zackhalsey.com/eula.html Privacy Policy: https://quantumshelf.zackhalsey.com/privacy.html

Screenshots

Stackby4 screens
QuantumShelf4 screens

Verdict

The call

The clearest difference is in-app purchases: Stackby at none against QuantumShelf's 4. Stackby also leads on iOS requirement (12.0 vs 18.0). QuantumShelf's advantage is update cadence (weekly vs every 6 weeks). 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. QuantumShelf sells 4 in-app purchases, starting at $4.99 per month. Stackby asks for nothing beyond the download.

UpkeepUpdate frequency

Stackby ships an update every 6 weeks, QuantumShelf weekly. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Stackby versus QuantumShelf: the parameters behind the verdict, then further details
ParameterStackbyQuantumShelf
PriceFreeFree
Rating4.3 (42 ratings) — better—
Positive reviews73.7% of reviews—
Number of ratings42 — better—
Update frequencyEvery 6 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS12.0 — better18.0
Further details — not scored
Size39 MB45 MB
Age rating4+4+
DeveloperRelytree Technologies Pvt. LtdZack Halsey

In-app purchases

None

Stackby

No in-app purchases

4 purchases

QuantumShelf

Subscriptions4
  • Pro Monthly$4.991 Month
  • Family Monthly$7.991 Month
  • Pro Annual$49.991 Year
Show 1 more
  • Family Annual$79.991 Year

Questions

Is Stackby free?
Stackby is free to download, with no in-app purchases.
Is QuantumShelf free?
QuantumShelf is free to download, with in-app purchases available.
Do Stackby or QuantumShelf have ads?
Neither Stackby nor QuantumShelf shows ads.
Which is updated more often, Stackby or QuantumShelf?
Stackby ships an update every 6 weeks, and QuantumShelf weekly. Most recently, Stackby was updated on October 16, 2026 and QuantumShelf on October 7, 2026.

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