# Java Flashcards vs SD Primer

The clearest difference is price: SD Primer at Free against Java Flashcards's $0.99. SD Primer also leads on update cadence (every 5 days vs every 136 months). Java Flashcards's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 17.0). On ads and device support there is nothing between them.

SD Primer is free to download; Java Flashcards costs $0.99 up front. SD Primer sells 2 in-app purchases, starting at $9.99 per month. Java Flashcards asks for nothing beyond the download.

Java Flashcards ships an update every 136 months, SD Primer every 5 days. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Java Flashcards | SD Primer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 136 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 30 MB | 20 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Polemics Applications LLC](https://appshunter.io/developer/482504032) | [Ernesto Hilvano](https://appshunter.io/developer/1740292069) |

## What reviewers say

### Java Flashcards

[App page](https://appshunter.io/ios/app/java-flashcards/id843001846)

Master Java programming with this comprehensive learning app. It offers flashcards, code snippets, a dictionary, quizzes, and interview preparation tools. Learn at your own pace with no ads or subscriptions.

**Highlights:** Key Java concepts, Code snippets and examples, Interactive flashcards, Java term dictionary, Practice quizzes, Interview preparation questions, Quick reference cheat sheet, Learning progress journal

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SD Primer

[App page](https://appshunter.io/ios/app/sd-primer/id6758010557)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SDPrimer Pro | $9.99 | per month |
| SDPrimer Pro | $99.99 | per year |


## Frequently asked questions

### Is Java Flashcards free?

Java Flashcards costs $0.99, with no in-app purchases.

### Is SD Primer free?

SD Primer is free to download, with in-app purchases available.

### Do Java Flashcards or SD Primer have ads?

Neither Java Flashcards nor SD Primer shows ads.

### Which is updated more often, Java Flashcards or SD Primer?

Java Flashcards ships an update every 136 months, and SD Primer every 5 days. Most recently, Java Flashcards was updated on September 29, 2026 and SD Primer on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*