Comparison

Stack Master vs Birthday Reminder | On Time

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

Head to head
About

Stack Master

Master your favorite card stacks with this mobile training application. It offers multiple training modes and challenges to analyze your weaknesses and improve your learning curve. Supports various pre-set and custom stacks.

Highlights
  • Multiple training modes
  • 18 funny challenges
  • Supports pre-set stacks
  • Create custom stacks
  • Publish scores and compare with friends
  • Specialized training modules
Features
Read full description

Stack Master is a stack training application. To learn a stack, best option from my perspective, are the flash cards. There are some awesome flash cards applications but I wanted something "stack oriented", easy and fun, that runs on my mobile phone ; a simple mobile application that analyzes my weaknesses and "trains" me accordingly, remembering my "weak cards" and my learning curve. Stack Master offers you to study your stack without pain, using 9 clever training modes and 18 funny challenges. Stack Master supports multiple stacks (Mnemonica, Aronson, Osterlind, Redford, Si-stebbins, Rix...) and you can add and create custom ones, directly from the application. You can even publish your score challenges and compare them with those of your friends! Besides the 18 funny challenges and the 4 training modules, 5 special training modules are available as well: * "The core", if you bought this nice routine of Pitt Hartling, you'll be able to train yourself with this dedicated module. * "Perfect hit", if you wish to improve your practice of effects like "Mnemonicosis" of the master Juan Tamariz, then this module is for you. * "Miracaan", if you bought this nice ACAAN of Dorian Caudal, you'll be able to train yourself with this dedicated module. * "Decimals of Pi", if you bought this effect of Vincent Hedan, you'll be able to train yourself with this dedicated module. * "Sandbox", if you only need to experiment something with a virtual deck of cards, be my guest!

About

Birthday Reminder | On Time

Features
Read full description

Welcome to the app! On the login screen, we greet you with the logo and the name of the developer. If you are logging in for the first time, we offer you a tutorial screen. There are three pages on this screen explaining the love we have for our loved ones and the importance of making them happy. Click the 'Get Started' button and you will be taken to the main screen. On the main screen, we welcome you with the 'Welcome' text and the (+) button. This screen provides a view of the contact list you will create. When you click the (+) button to add a new contact, you will be directed to the 'Add Contact' screen. First select 'Contact profile picture', then fill in 'name', 'surname' and 'birthday' and save. Contact cards show the birthdays and remaining days of the people you add. To create a contact card, add a person whose birthday is tomorrow. Do not forget to fill in the requested information, otherwise you will receive a warning. After saving, you will be taken to the main screen. The birthday cake icon will be displayed on the cards of people whose birthday is today. Contact cards are sorted in order of days remaining, from least to most. To delete contact cards, simply swipe left. Once you confirm the deletion, the card will be deleted automatically. * Capacity to add up to 20 people! * 7 different language support ! * Celebrate birthdays first by getting notifications at midnight! * The aim is to see the birthdays of all people on a single screen and to present a simple design. By starting to use our application, you will never forget the birthdays of your loved ones and make them happy!

Screenshots

Stack Master2 screens
Birthday Reminder | On Time4 screens

Verdict

The call

The clearest difference is price: Birthday Reminder | On Time at Free against Stack Master's $24.99. Birthday Reminder | On Time also leads on update cadence (weekly vs every 3 weeks). Stack Master's advantage is iOS requirement (11.0 vs 16.0). On ads, in-app purchases 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

Birthday Reminder | On Time is free to download; Stack Master costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stack Master ships an update every 3 weeks, Birthday Reminder | On Time weekly. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Stack Master versus Birthday Reminder | On Time: the parameters behind the verdict, then further details
ParameterStack MasterBirthday Reminder | On Time
Price$24.99Free — better
Rating3.8 (9 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings9 — better—
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better16.0
Further details — not scored
Size36 MB6 MB
Age rating4+12+
DeveloperDevious-MonkeyZeki Baklan

In-app purchases

None

Stack Master

No in-app purchases

None

Birthday Reminder | On Time

No in-app purchases

Questions

Is Stack Master free?
Stack Master costs $24.99, with no in-app purchases.
Is Birthday Reminder | On Time free?
Birthday Reminder | On Time is free to download, with no in-app purchases.
Do Stack Master or Birthday Reminder | On Time have ads?
Neither Stack Master nor Birthday Reminder | On Time shows ads.
Which is updated more often, Stack Master or Birthday Reminder | On Time?
Stack Master ships an update every 3 weeks, and Birthday Reminder | On Time weekly. Most recently, Stack Master was updated on October 8, 2026 and Birthday Reminder | On Time on September 30, 2026.

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