Comparison

Google Calendar vs Linear System Solver

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

Head to head
About

Google Calendar

This official app helps you manage your schedule and stay organized. It automatically adds events from Gmail, syncs across devices, and allows for shared calendars. You can also create tasks, customize views, and integrate with Google Meet for collaboration.

Highlights
  • Automatic event import from Gmail
  • Cross-device synchronization
  • Shared calendars for collaboration
  • Task management alongside events
  • Customizable views and themes
  • Google Meet integration
Features
Read full description

The official Google Calendar app helps you stay organized and plan your day with easy event creation, multiple calendars, customizable views, widgets, and tasks. With Google Calendar, you can: • Get events automatically added to your Calendar from Gmail, including flight, hotel, concert, and restaurant reservations. • Go from using Calendar on your iPhone, iPad, or Apple Watch to your computer without missing a beat when you’re logged into the same Google account. • Consolidate and view Google Calendar events side-by-side with other calendars on your device, including Exchange and iCloud. • Keep family, friends, and colleagues in the loop with shared calendars, so they can view, add, or modify events. • Quickly switch between month, week, and day views. • Stay on top of to-dos by creating and managing tasks alongside your events in Calendar. • Personalize your Google Calendar with light or dark mode or by color-coding your events • Always know what's next while on the go with Google Calendar on Apple Watch by customizing your watch face with Calendar complications or adding widgets. Google Calendar is part of Google Workspace, allowing you and your team to easily connect, create, and collaborate across all your favorite Google tools. You can: • Collaborate in a hybrid work environment by adding a Google Meet video call to an Calendar event • Get access to professional booking pages to easily book clients and customers*. • Schedule meetings with teammates by checking their availability or layering their calendars in a single view • Add your working location to your calendar to make it easier for your teammates to schedule meetings with you*. • Keep everyone on track for a meeting by attaching meeting notes, pre-read materials, and other documents directly to a calendar event. • Use Google Calendar with confidence knowing it’s supported by Google’s enterprise-level privacy, user safety and data security. * Requires a Google Workspace or Google One AI Premium subscription

About

Linear System Solver

Features
Read full description

This application helps students or any person who needs, to solve a system of 3 linear equation with 3 unknowns. A system of linear equations is of this type: / | a11.x + a12.y + a13.z = c1 | a21.x + a22.y + a23.z = c2 | a31.x + a32.y + a33.z = c3 \ Values are required for x,y,z which satisfy the 3 equations. In the application skema, insert the matrix coefficients: a11 a12 a13 a21 a22 a23 a31 a32 a33 and next insert the constant values: c1 c2 c3 Finally, hit the Solve button. If the system has a real solution, this will be shown (x,y,z) in the last row. If no real solution exists, NO,NO,NO will be shown.

Screenshots

Google Calendar4 screens
Linear System Solver2 screens

Verdict

The call

The clearest difference is price: Google Calendar at Free against Linear System Solver's $0.99. Google Calendar also leads on chart position (#17 vs unranked). Linear System Solver's advantage is in-app purchases (none vs 32) and update cadence (every 3 days vs weekly). On 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

Google Calendar is free to download; Linear System Solver costs $0.99 up front. Google Calendar sells 22 in-app purchases, starting at $0.89 per month. Linear System Solver asks for nothing beyond the download.

UpkeepUpdate frequency

Google Calendar ships an update weekly, Linear System Solver every 3 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 6 level
Google Calendar versus Linear System Solver: the parameters behind the verdict, then further details
ParameterGoogle CalendarLinear System Solver
PriceFree — better$0.99
Rating4.5 (132K ratings) — better—
Positive reviews34.9% of reviews—
Number of ratings132K — better—
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#17 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size290 MB1 MB
Age rating4+4+
DeveloperGoogleLuigi Fonti

Bugs and requests

Google Calendar

Reported bugs

3 issues
  • Events not syncing properly between app and web versions
  • Incorrect time zone changes for events
  • New events automatically added to wrong calendar

Requested features

5 requests
  • Allow recurring events on specific days (e.g. 2nd Wednesday of the month)
  • Add ability to set reminders for event end times
  • Integrate with more email/calendar providers beyond Gmail
  • Provide more customization options for event colors and icons
  • Display the current date on the app icon

Linear System Solver

Not enough reviews yet to summarise bugs or requests.

In-app purchases

22 purchases

Google Calendar

Subscriptions22
  • 30 GB1 Month trial$0.891 Month
  • 30 GB$0.891 Month
  • 100 GB2 variants$1.991 Month
Show 19 more
  • 100 GB1 Month trial2 variants$1.991 Month
  • 200 GB1 Month trial2 variants$2.991 Month
  • 200 GB2 variants$2.991 Month
  • Google AI Plus (400 GB)$4.991 Month
  • Google AI Plus (2 TB)1 Month trial2 variants$9.991 Month
  • Google AI Plus (2 TB)2 variants$9.991 Month
  • Google AI Pro (5 TB)2 variants$19.991 Month
  • 100 GB1 Month trial$19.991 Year
  • 100 GB$19.991 Year
  • 100 GB1 Year trial$19.991 Year
  • Google One AI Premium (2 TB)$19.991 Month
  • 5 TB$24.991 Month
  • 200 GB1 Year trial$29.991 Year
  • 200 GB$29.991 Year
  • 20 TB$99.991 Month
  • 2 TB1 Month trial$99.991 Year
  • 2 TB$99.991 Year
  • Google AI Ultra (30 TB)$249.991 Month
  • 5 TB2 variants$249.991 Year
None

Linear System Solver

No in-app purchases

Questions

Is Google Calendar free?
Google Calendar is free to download, with in-app purchases available.
Is Linear System Solver free?
Linear System Solver costs $0.99, with no in-app purchases.
Do Google Calendar or Linear System Solver have ads?
Neither Google Calendar nor Linear System Solver shows ads.
Which is updated more often, Google Calendar or Linear System Solver?
Google Calendar ships an update weekly, and Linear System Solver every 3 days. Most recently, Google Calendar was updated on October 15, 2026 and Linear System Solver on October 12, 2026.

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