Comparison

Calendars vs InstantQuiz

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

Head to head
About

Calendars

This app combines calendar, task management, and habit tracking to boost productivity and organization. It offers seamless syncing across Apple devices and integrates with popular services like Google Calendar. Plan your day, manage tasks, and build routines with customizable views and features.

Highlights
  • Calendar and task management
  • Habit tracking and routine building
  • Cross-device syncing
  • Natural language event creation
  • Integration with Google Calendar and Zoom
  • Customizable views and widgets
Features
Read full description

Calendars by Readdle is the all-in-one calendar, task manager, daily planner, and habit tracker — seamlessly working across all your Apple devices: Mac, iPhone, iPad, and Apple Watch. Plan your day, build better habits, boost productivity, and stay organized with powerful features and smooth sync between all your devices. What you can do with Calendars: • View and manage your calendar with daily, weekly, and monthly views • Create events, set reminders, and never miss important dates • Use the built-in agenda planner to focus on what matters most • Organize your to-do list and manage your tasks with ease • Quickly add events or to-do items using natural language • Build routines and track your habits to stay consistent • Take a guided productivity course to improve time management and focus • Sync across devices with Google Calendar, iCloud, and more • Customize your planner calendar with color coding and widgets • Join Zoom, Google Meet, or GoToMeeting directly from your calendar • Stay in control of your time, wherever you are Whether you're planning a busy workday, building new habits, or working on personal growth, Calendars brings everything together to help you own your time — across all your Apple devices. Privacy Policy: https://readdle.com/calendars/legal/privacy Terms of Service: https://readdle.com/calendars/legal/terms Have questions, comments, or issues? Don’t hesitate to reach out to us at http://readdle.com/contact

About

InstantQuiz

Features
Read full description

Trivia & Number Count Why stick to one topic? Switch it up with our multi-category quiz: General Knowledge: From history to pop culture. City Quiz: Travel the world from your screen. Number Count: Sharpen your mental math. Bus Quiz: Sharpen & Brush up your bus driver knowledge. Alphabet: Quick-fire letter association. Translates text to speech in Count screens in different languages in real time. It also features a variety of quizzes—including General Knowledge, Bus Driver, and Football—as well as a Number Count tool. The app is available in many languages, including: English, Spanish, French, German, Arabic,Chinese, Polish, Portuguese, Romanian, Shona, and Swahili. Learn General Knowledge,Practise Number & Letter Quiz & Practise Bus Quiz

Screenshots

Calendars4 screens
InstantQuiz4 screens

Verdict

The call

The clearest difference is price: Calendars at Free against InstantQuiz's $3.99. Calendars also leads on update cadence (weekly vs every 5 months) and chart position (#115 vs unranked). InstantQuiz's advantage is in-app purchases (none vs 10) and iOS requirement (15.6 vs 18.2). 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

Calendars is free to download; InstantQuiz costs $3.99 up front. Calendars sells 10 in-app purchases, starting at $3.99 per month. InstantQuiz asks for nothing beyond the download.

UpkeepUpdate frequency

Calendars ships an update weekly, InstantQuiz every 5 months. The most recent releases landed on November 12, 2026 and September 29, 2026 respectively.

Scorecard5 real differences · 6 level
Calendars versus InstantQuiz: the parameters behind the verdict, then further details
ParameterCalendarsInstantQuiz
PriceFree — better$3.99
Rating4.7 (123K ratings) — better—
Positive reviews56.0% of reviews—
Number of ratings123K — better—
Update frequencyWeekly — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
Best chart rank#115 — better—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS18.215.6 — better
Further details — not scored
Size414 MB101 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedTonderai Cheza

Bugs and requests

Calendars

Reported bugs

3 issues
  • Disappearing events and appointments
  • Upgrade process causing data loss
  • Freezing and crashing on certain devices

Requested features

5 requests
  • Recurring events for free users
  • Customizable widgets and app icons
  • Ability to archive/restore past events
  • Improved Apple Watch integration
  • Shared calendars and family management

InstantQuiz

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Calendars

Subscriptions6
  • Calendars PRO 1 Month$3.991 Month
  • Calendars by Readdle: Interesting Calendars1 Month trial$3.991 Year
  • Calendars PRO 1 Month7 Days trial$3.991 Month
Show 3 more
  • Calendars PRO 1 Year7 Days trial$19.991 Year
  • Calendars PRO 1 Year1 Year trial$19.991 Year
  • Calendars PRO 1 Year7 Days trial$21.991 Year
One-time4
  • Smart Input Upgrade$1.99
  • My schedule planner, Organizer$6.99
  • Full Pack$12.99
Show 1 more
  • Recurring Events$31.99
None

InstantQuiz

No in-app purchases

Questions

Is Calendars free?
Calendars is free to download, with in-app purchases available.
Is InstantQuiz free?
InstantQuiz costs $3.99, with no in-app purchases.
Do Calendars or InstantQuiz have ads?
Neither Calendars nor InstantQuiz shows ads.
Which is updated more often, Calendars or InstantQuiz?
Calendars ships an update weekly, and InstantQuiz every 5 months. Most recently, Calendars was updated on November 12, 2026 and InstantQuiz on September 29, 2026.

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