Comparison

Synthesis24 vs ReadBuddy

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

Head to head
About

Synthesis24

Features
Read full description

Four numbers. One target: 24. Use addition, subtraction, multiplication and division to turn four number cards into 24. Use each starting number once, and combine intermediate results as you work toward the answer. Drag numbers and operation symbols into place to build your calculation. Choose how to play: - Levels: solve puzzles and unlock the next level. - Endless mode: solve a puzzle, then try a new set of numbers. The refreshed home screen brings updated graphics, rounded buttons and icons to the same number puzzle. Explore 800 levels, with easier puzzles between challenges.

About

ReadBuddy

Features
Read full description

ReadBuddy is your intelligent reading companion designed to help you never forget what you read. Whether you're a student studying for exams, a researcher building a knowledge base, or a lifelong learner capturing insights from books, ReadBuddy provides the tools you need to capture, organize, and retain knowledge. KEY FEATURES • Smart Text Capture Capture important snippets from books, articles, PDFs, and documents. Use your camera to scan text with advanced OCR technology, manually type passages, or extract text from PDFs. Never lose a valuable insight again. • Organize Your Reading Create collections to organize snippets by book, topic, or project. Add tags for easy searching and filtering. Build your personal knowledge library that grows with every read. • Dictionary & Word Lookup Look up unfamiliar words instantly while reading. Scan words directly from physical books using your camera. Get definitions without leaving your reading flow. • AI-Powered Summaries Generate concise summaries for individual snippets or entire collections. Get intelligent insights from your reading patterns. Receive automated weekly digests of all your saved content. • Learning Tools Convert your snippets into study flashcards for active recall. Track your reading progress and snippet collection growth with detailed statistics. Export summaries and flashcards to PDF or Notion. • Smart Reminders Set reading reminders to review your snippets. Get notified to review older snippets for better retention with spaced repetition. Customize your review schedule to fit your learning style. • Voice Notes Record voice notes while reading to capture thoughts and ideas. Automatically transcribe voice notes to text. Perfect for capturing insights on the go. • Privacy & Security Your data is stored securely on your device. Optional biometric authentication protects your reading data. All your information stays private and secure. SUBSCRIPTION PLANS • Free: Save and organize snippets, basic dictionary lookup, limited manual summaries, basic statistics • Pro: Unlimited snippets, AI-powered summaries, weekly digest emails, advanced export options, cloud backup and sync, priority support, advanced statistics and insights PRIVACY & SECURITY Your privacy is our priority. All data is encrypted and stored securely on your device. We never share your personal information or reading data with third parties. PERFECT FOR • Students: Capture key points from textbooks, create flashcards for exams, organize research notes by subject • Researchers: Build a knowledge base from research papers, generate summaries of lengthy documents, export research notes • Lifelong Learners: Remember insights from books, build a second brain of knowledge, track reading progress • Professionals: Capture insights from industry articles, organize information by project, generate quick summaries START BUILDING YOUR KNOWLEDGE BASE TODAY Join readers who are taking control of their learning and never forgetting what they read. Download ReadBuddy and start capturing, organizing, and remembering your reading today. Whether you're reading your first book or your thousandth, ReadBuddy is here to help you remember every important insight Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Synthesis244 screens
ReadBuddy4 screens

Verdict

The call

Synthesis24 and ReadBuddy are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Synthesis24 versus ReadBuddy: the parameters behind the verdict, then further details
ParameterSynthesis24ReadBuddy
PriceFreeFree
Update frequencyEvery 6 months—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size82 MB47 MB
Age rating4+4+
Developerę°č¶… ęØYray & Partners LTD

In-app purchases

None

Synthesis24

No in-app purchases

None

ReadBuddy

No in-app purchases

Questions

Is Synthesis24 free?
Synthesis24 is free to download, with no in-app purchases.
Is ReadBuddy free?
ReadBuddy is free to download, with no in-app purchases.
Do Synthesis24 or ReadBuddy have ads?
Neither Synthesis24 nor ReadBuddy shows ads.

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