Comparison

C Library Reference vs CardFlip

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

Head to head
About

C Library Reference

Features
Read full description

**C Library Reference** ist deine umfassende Referenz für die C-Standardbibliothek – perfekt für Studenten, Programmierer und alle, die C lernen oder nachschlagen möchten. **IDEAL FÜR C-LERNENDE** Egal ob du gerade mit C programmieren beginnst oder dein Wissen vertiefen möchtest – diese App bietet dir schnellen Zugriff auf über 100 C-Funktionen mit verständlichen Erklärungen, praxisnahen Beispielen und interaktiven Lernmodi. **HAUPTFUNKTIONEN** Umfassende Bibliothek • Über 100 C-Standardfunktionen • Organisiert nach Kategorien (I/O, String, Memory, Math, etc.) • Detaillierte Syntax und Header-Informationen • Mehrere Codebeispiele pro Funktion Interaktives Lernen • Quiz-Modus mit Multiple-Choice und Lückentexten • Flashcards für effektives Wiederholen • Kategorie-spezifisches Training • Fortschrittsverfolgung Persönliche Lernumgebung • Markiere Favoriten für schnellen Zugriff • Notizen zu einzelnen Funktionen • Tags für individuelle Organisation • Lernstatistiken Code-Vorlagen & Referenzen • Häufig verwendete C-Muster • Übersicht über Standard-Bibliotheken • Syntax-Highlighting für bessere Lesbarkeit • Beispiele mit Erklärungen Modern & Benutzerfreundlich • Natives SwiftUI-Design für iOS und iPadOS • Intuitive Navigation • Suchfunktion für schnelles Finden • Teilen-Funktion für Code und Syntax iCloud-Synchronisation • Deine Favoriten, Notizen und Fortschritte • Automatisch auf allen Geräten verfügbar • Sichere Datenspeicherung **FÜR WEN IST DIESE APP?** Informatik-Studenten Programmier-Anfänger C-Entwickler, die eine schnelle Referenz benötigen Alle, die C lernen oder ihr Wissen auffrischen möchten **KATEGORIEN UMFASSEN:** • Input/Output (printf, scanf, fopen, fclose, etc.) • String-Funktionen (strlen, strcpy, strcmp, strcat, etc.) • Speicherverwaltung (malloc, free, calloc, realloc, etc.) • Mathematik (sqrt, pow, sin, cos, tan, etc.) • Zeit-Funktionen (time, clock, strftime, etc.) • Zeichen-Operationen (isdigit, isalpha, toupper, etc.) • Prozess-Steuerung (exit, system, getenv, etc.) • Konvertierung (atoi, atof, sprintf, sscanf, etc.) • Algorithmen (qsort, bsearch) • Datenstrukturen (struct, union, enum, typedef) **KOMPLETT KOSTENLOS** Keine In-App-Käufe, keine Werbung, keine Abonnements. Alle Funktionen sind von Anfang an verfügbar.

About

CardFlip

Create and study custom flashcards with spaced repetition to optimize memorization. Offers multiple study modes like quiz and matching, with offline access and detailed progress tracking. Designed for students to learn vocabulary, terms, and formulas efficiently.

Highlights
  • Custom flashcard creation
  • Spaced repetition system
  • Multiple study modes (Flip, Quiz, Match, Type)
  • Offline study capabilities
  • Progress tracking and analytics
  • Import/export flashcards
Features
Read full description

Make your own flashcards in seconds and let spaced repetition tell you exactly what to review today. CardFlip is a free flashcard maker for students who want to memorize words, terms and formulas without an account, without a paywall and without an internet connection. FOUR WAYS TO STUDY YOUR CARDS - Flip: classic flashcards with a smooth 3D turn. Tap to reveal the answer, then rate how confident you were from 1 to 5. - Quiz: multiple-choice questions built automatically from your own study cards. - Match: find the front-and-back pairs in a memory grid and beat your own time. - Type: write the answer from memory to test real recall, not recognition. SPACED REPETITION THAT DOES THE PLANNING Spaced repetition is the reason flashcards work. CardFlip schedules every card for the day you are about to forget it, so a few minutes of revision each morning replaces a night of cramming. Each deck shows how many cards are due today, so you always know where to start. BUILT FOR REAL STUDYING - Unlimited decks and unlimited study cards. - An optional hint on any card for when you are close but not quite there. - Tag decks by subject - Spanish, biology, anatomy, history, GRE, SAT. - Search every card in every deck at once. - Import hundreds of cards from a CSV or a tab-separated file, export any deck as JSON. LEARN VOCABULARY OFFLINE Every deck lives on your device. Language learning cards work on a plane, on the metro and in a basement lecture hall. Nothing to sync, nothing to log in to. TRACK THE WORK - A daily streak, and a record of your best one. - XP for every card studied and every quiz answered. - Achievements as your decks fill up. - A weekly chart of the minutes you actually put in. - A progress ring on every deck showing how much of it you have mastered. PRIVACY FIRST Your decks and your progress stay on your device. No account. No personal data collected. Your study cards are yours alone. MADE FOR STUDENTS Light and dark themes, smooth flip animations, tuned haptics and adjustable card text - the small things that make revision cards something you actually open. Whether you are learning a language, prepping for the GRE or SAT, memorizing medical terms, revising for school exams or building vocabulary, CardFlip is your offline study companion. Download CardFlip and start memorizing, one card at a time.

Screenshots

C Library Reference4 screens
CardFlip4 screens

Verdict

The call

The clearest difference is update cadence: C Library Reference at every 3 days against CardFlip's every 6 weeks. CardFlip's advantage is iOS requirement (15.0 vs 17.0). On price, 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

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

UpkeepUpdate frequency

C Library Reference ships an update every 3 days, CardFlip every 6 weeks. The most recent releases landed on October 5, 2026 and September 25, 2026 respectively.

Scorecard2 real differences · 8 level
C Library Reference versus CardFlip: the parameters behind the verdict, then further details
ParameterC Library ReferenceCardFlip
PriceFreeFree
Rating—3.5 (4 ratings) — better
Positive reviews—66.7% of reviews
Number of ratings—4 — better
Update frequencyEvery 3 days — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size3 MB53 MB
Age rating4+4+
DeveloperRoger RubGunawan Santoso

In-app purchases

None

C Library Reference

No in-app purchases

None

CardFlip

No in-app purchases

Questions

Is C Library Reference free?
C Library Reference is free to download, with no in-app purchases.
Is CardFlip free?
CardFlip is free to download, with no in-app purchases.
Do C Library Reference or CardFlip have ads?
Neither C Library Reference nor CardFlip shows ads.
Which is updated more often, C Library Reference or CardFlip?
C Library Reference ships an update every 3 days, and CardFlip every 6 weeks. Most recently, C Library Reference was updated on October 5, 2026 and CardFlip on September 25, 2026.

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