Comparison

Stacked vs CrewSync

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

Head to head
About

Stacked

Features
Read full description

You've spent years building your book collection. Hundreds — maybe thousands — of titles across shelves, rooms, and boxes. But do you actually know what you own? Or who borrowed that copy of Atomic Habits six months ago and never returned it? That's exactly why we built Stacked. Stacked is the smartest, cleanest personal library management app available today. Whether you're a casual reader with 50 books or a serious collector with thousands, Stacked gives you complete control over your collection — without the spreadsheets, the sticky notes, or the guesswork. SCAN ANY BOOK IN SECONDS Point your camera at any barcode. Stacked pulls the title, author, cover image, and full details instantly from our network of 5 book databases. No typing. No hunting. Just tap and done. Can't scan? Enter the ISBN manually and get the same instant results. NEVER LOSE A BOOK AGAIN The #1 problem with lending books: you forget who has what. Stacked fixes that. - Record who borrowed each book and when - Set custom due dates with automatic reminders - Get push notifications before loans go overdue - See your complete lending history at a glance Your books come back. Friendships stay intact. YOUR LIBRARY. YOUR WAY. - Organise books across unlimited shelves and locations - Add custom covers, notes, and shelf labels - Search and filter your entire collection instantly - Track multiple copies of the same title - View library reports — collection growth, top readers, overdue loans BUILT FOR PRIVACY. WORKS OFFLINE. Your library data lives on your device — not our servers. Stacked works completely offline. No internet? No problem. Your collection is always accessible, always fast, always yours. PREMIUM: UNLOCK YOUR FULL LIBRARY The free plan covers up to 30 books — perfect for getting started. When you're ready to go unlimited: - Unlimited books — no cap, ever - Automatic cloud backup — switch devices without losing a thing - Advanced library reports and analytics - Priority support from our team One affordable annual subscription. Cancel anytime through your App Store account settings. WHO IS STACKED FOR? - Book lovers who want to know exactly what they own - Home library enthusiasts who lend books to friends and family - Small institutional libraries — schools, offices, clubs - Collectors who care about their catalogue as much as their collection WHAT OUR USERS SAY "Finally, an app that doesn't make managing my library feel like admin work." "I scanned my entire collection of 400 books in an afternoon." "The loan tracker alone is worth it — I've recovered 12 books already." FROM THE TEAM AT NEUVO WEBTECH LLP Stacked is built and maintained by Neuvo WebTech LLP, a software engineering firm based in Kolkata, India, with clients across four continents. We build software that solves real problems — and a disorganised library is a very real problem. Questions? We're at support@neuvo.co. We reply to every message. Privacy Policy: https://stacked.co.in/privacy.html Terms of Use: https://stacked.co.in/terms.html

About

CrewSync

This app helps airline crew manage their schedules, view flight details, and access important information like weather and hotel details. It offers automatic schedule import for supported airlines and syncs across devices, including Apple Watch.

Highlights
  • Automatic schedule import
  • Apple Watch integration
  • Flight and rest analysis
  • Weather and METAR data
  • Crew network and sharing
  • Calendar sync and export
Features
Read full description

CrewSync is the app built by crew, for crew: ABX Air, GOL, LATAM and Azul. Import your roster in seconds and see it on iPhone and Apple Watch, in sync. SUPPORTED AIRLINES • ABX Air: via CrewLink / IADP (NetLine/Crew) • GOL: automatic import via CrewLink / IADP, or by PDF • LATAM: straight from iFlight Crew (SSO), or by PDF • Azul: straight from CAE (SSO), or by PDF • Another airline? Talk to us: appcomin.com/contact NEW: WELLBEING (SLEEP LOG AND COSMIC RADIATION) • Sleep Log: keep a record of your nights next to your roster. If you allow it, the app reads sleep and workouts from the Health app (Apple Watch, Garmin, Samsung); you can also log them by hand • Mark what disturbed the night and see how much you slept in the 24h and 48h before report time • Cosmic Radiation: a dose estimate per flight, month and year, from your roster and public NOAA space weather data • Health app access is optional and read-only: CrewSync never writes to it, and your sleep stays on your iPhone • Informational only: not a medical device, no diagnosis, and it does not determine fitness to fly CREW CHAT AND CREW TALK • Flight chat: the group for your own crew, open 24h before departure. Only crew rostered on that flight get in, and messages disappear afterwards • Crew Talk: the crew community by city and topic. Hotels, restaurants, transport and classifieds • Real moderation: filter on send, reporting, blocking and human review SIRI AND CARPLAY • "Hey Siri, how is my flight in CrewSync": boarding gate, destination weather and your report time, hands free • Next flight, today's and tomorrow's roster, day off, standby and layover. Answers even in airplane mode AIRCRAFT TRACK AND LIVE DUTY • See on the map where your inbound aircraft is coming from, live, and look up any aircraft by registration • Duty bar on the home screen with an alert near the limit ON APPLE WATCH • Next flight and rest in the Smart Stack • Live flight tracking and hotel pickup at a glance • Route map and destination weather ON IPHONE • Hotels and airport pickup on layovers (BETA) • Roster change alerts: what changed, before and after • Duty and rest limits, hours by period, statistics • METAR / SIGMET / weather radar • Meal per diems, catering sheet and salary estimator (BETA, Brazilian carriers) • iPhone calendar, .ics export, Visitor Mode for family PRIVACY Your airline portal credentials stay on your iPhone (Keychain), never on our servers. Rosters live in your account to sync devices. Salary estimator and Sleep Log data stay on the device. PREMIUM CrewSync is free for basic use. Premium unlocks Apple Watch, duty and rest limits, advanced statistics, full calendar, connections, .ics export, per diems, catering and the salary estimator, and more. Plans: Monthly • 6 months (22% off) • Annual (33% off, MOST POPULAR) • Lifetime (one-time). 7 days free for new subscribers, auto-renewing; cancel in Settings > Apple ID > Subscriptions. Terms: https://www.appcomin.com/crewsync/terms Privacy: https://www.appcomin.com/crewsync/privacy NOTICE CrewSync is an independent app, not affiliated with ABX Air, GOL, LATAM, Azul or any airline. BETA features depend on official systems: always confirm critical times and figures on your company portal. REQUIREMENTS iPhone with iOS 17+. Apple Watch with watchOS 10+ (optional). Importing a roster needs internet and a CrewSync account.

Screenshots

Stacked4 screens
CrewSync4 screens

Verdict

The call

The clearest difference is iOS requirement: Stacked at 15.5 against CrewSync's 17.0. On price, update cadence, ads and in-app purchases 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. Stacked sells 1 in-app purchase, starting at $24.99 per year and CrewSync sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Stacked ships an update daily, CrewSync every 2 days. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.

Scorecard1 real difference · 9 level
Stacked versus CrewSync: the parameters behind the verdict, then further details
ParameterStackedCrewSync
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyDaily — betterEvery 2 days
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.5 — better17.0
Further details — not scored
Size74 MB47 MB
Age rating12+4+
DeveloperNeuvo WebTech LLPFLAVIO COMIN

In-app purchases

1 purchases

Stacked

Subscriptions1
  • Stacked Premium Yearly$24.991 Year
4 purchases

CrewSync

Subscriptions3
  • Monthly7 Days trial$4.991 Month
  • 6 Months7 Days trial$22.996 Months
  • Annual7 Days trial$39.991 Year
One-time1
  • Lifetime premium$129.99

Questions

Is Stacked free?
Stacked is free to download, with in-app purchases available.
Is CrewSync free?
CrewSync is free to download, with in-app purchases available.
Do Stacked or CrewSync have ads?
Neither Stacked nor CrewSync shows ads.
Which is updated more often, Stacked or CrewSync?
Stacked ships an update daily, and CrewSync every 2 days. Most recently, Stacked was updated on September 17, 2026 and CrewSync on September 26, 2026.

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