Comparison

BaseLearn by ChatStick vs Probability Theory Foundations

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

Head to head
About

BaseLearn by ChatStick

Features
Read full description

BaseLearn helps students, developers, and curious learners understand number systems through practice, not memorization. Convert instantly between Binary, Decimal, Octal, and Hexadecimal while you type. Then open a guided explanation to see exactly how each result was calculated. Why BaseLearn: - Real-time base conversion with clean, readable results - Step-by-step explanation mode for deeper understanding - Structured lesson path with progress, XP, and streak tracking - Quiz modes that build speed and accuracy - History and favorites to revisit important conversions - Advanced tools for practical binary/hex workflows What you can do: - Convert values across major number bases in seconds - Group binary digits for easier reading - Learn core concepts with 14 focused lessons - Practice with multiple quiz types, including a timed challenge - Use utility tools such as Twoโ€™s Complement, Bit Length View, Fractional Converter, Custom Base (2-36), and ASCII Table Premium: - One-time purchase (no subscription) - Unlock full lessons, all quiz types, and full tool access - Remove ads and free-tier limits Whether you are preparing for exams, learning computer science fundamentals, or refreshing your base-conversion skills, BaseLearn gives you a fast and structured way to improve every day.

About

Probability Theory Foundations

Features
Read full description

Probability Theory Foundations is an independent study app for learners who want structured practice in core probability ideas, problem-solving habits, and exam-style reasoning. Built for students, self-learners, and anyone reviewing fundamentals, the app includes 160 questions across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts. Every question includes an explanation so you can understand why an answer works, not just whether it was right. Features: - FSRS spaced-repetition intervals to help review at the right time - Weak-point heatmap to spot topics that need attention - Daily challenge for consistent practice - Mock exams for timed review - Offline practice with no login required - Explanations for every question Practice offline, no login required. Independent study app for Probability Theory Foundations practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners.

Screenshots

BaseLearn by ChatStick4 screens
Probability Theory Foundations4 screens

Verdict

The call

The clearest difference is in-app purchases: Probability Theory Foundations at none against BaseLearn by ChatStick's 1. Probability Theory Foundations also leads on ads (none vs shown) and iOS requirement (15.1 vs 26.0). On price and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. BaseLearn by ChatStick sells 1 one-off in-app purchase. Probability Theory Foundations asks for nothing beyond the download.

Scorecard3 real differences ยท 2 level
BaseLearn by ChatStick versus Probability Theory Foundations: the parameters behind the verdict, then further details
ParameterBaseLearn by ChatStickProbability Theory Foundations
PriceFreeFree
AdsYesNo โ€” better
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS26.015.1 โ€” better
Further details โ€” not scored
Size10 MB38 MB
Age rating4+4+
DeveloperChatStick Company LimitedAFTW LLC

In-app purchases

1 purchases

BaseLearn by ChatStick

One-time1
  • BaseLearn Premium Unlock$1.99
None

Probability Theory Foundations

No in-app purchases

Questions

Is BaseLearn by ChatStick free?
BaseLearn by ChatStick is free to download, with in-app purchases available.
Is Probability Theory Foundations free?
Probability Theory Foundations is free to download, with no in-app purchases.
Do BaseLearn by ChatStick or Probability Theory Foundations have ads?
BaseLearn by ChatStick shows ads; Probability Theory Foundations does not.

Other comparisons