# ProblemSum vs Korean Flashcards TOPIK

The clearest difference is price: ProblemSum at $6.99 against Korean Flashcards TOPIK's $29.99. ProblemSum also leads on update cadence (every 3 weeks vs every 10 months). Korean Flashcards TOPIK's advantage is iOS requirement (15 vs 18.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

ProblemSum costs $6.99 and Korean Flashcards TOPIK $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ProblemSum ships an update every 3 weeks, Korean Flashcards TOPIK every 10 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ProblemSum | Korean Flashcards TOPIK |
| --- | --- | --- |
| Price | **$6.99** | $29.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/problemsum/id1273718042/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 10 months |
| Monetization | Paid | Paid |
| Size | 3 MB | 24 MB |
| Requires iOS | 18.0 | **15** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aeterna Solutions](https://appshunter.io/developer/1273718041) | [Handtechnics](https://appshunter.io/developer/505784461) |

## What reviewers say

### ProblemSum

[App page](https://appshunter.io/ios/app/problemsum/id1273718042)

Practice math word problems aligned with the Singapore Mathematics syllabus for Primary 6 students. Get detailed solutions for each problem. The app works offline and requires no account.

**Highlights:** Random math word problem generation, Singapore Math syllabus alignment, Detailed step-by-step solutions, Offline functionality, No account required, Ad-free experience

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases:** none


### Korean Flashcards TOPIK

[App page](https://appshunter.io/ios/app/korean-flashcards-topik/id1505823386)

Master over 5000 Korean words for the TOPIK test with this comprehensive flashcard app. It features audio for each word and is designed to provide a distraction-free learning environment for effective study.

**Highlights:** 5700 Korean words for TOPIK levels I & II, Audio pronunciation for each word, Distraction-free study environment, Organized by TOPIK proficiency levels, Designed for test preparation

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ProblemSum free?

ProblemSum costs $6.99, with no in-app purchases.

### Is Korean Flashcards TOPIK free?

Korean Flashcards TOPIK costs $29.99, with no in-app purchases.

### Do ProblemSum or Korean Flashcards TOPIK have ads?

Neither ProblemSum nor Korean Flashcards TOPIK shows ads.

### Which is updated more often, ProblemSum or Korean Flashcards TOPIK?

ProblemSum ships an update every 3 weeks, and Korean Flashcards TOPIK every 10 months. Most recently, ProblemSum was updated on October 26, 2026 and Korean Flashcards TOPIK on October 27, 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.*