# LeetCard vs System Design interview prep

The clearest difference is review sentiment: LeetCard at 54% against System Design interview prep's 0%. LeetCard also leads on rating (4.5 vs 1.0) and update cadence (every 2 days vs monthly). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. LeetCard sells 3 in-app purchases, starting at $3.99 per month and System Design interview prep sells 5 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

LeetCard holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: LeetCard has 80 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 54% of LeetCard's written reviews are positive against 0% of System Design interview prep's.

LeetCard ships an update every 2 days, System Design interview prep monthly. The most recent releases landed on October 9, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | LeetCard | System Design interview prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (80 ratings)](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/system-design-interview-prep/id6756310915/reviews) |
| Number of ratings | **80** | 2 |
| Positive reviews | **53.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 124 MB | 89 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Kubicle LLC](https://appshunter.io/developer/1679797468) | [Abdelhak El Moussaoui](https://appshunter.io/developer/1827690433) |

## What reviewers say

### LeetCard

[App page](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443)

Prepare for coding interviews with AI-powered flashcards and adaptive learning. Master data structures, algorithms, and coding patterns with personalized plans and intelligent hints. Track your progress with detailed analytics to identify weak areas and stay motivated.

**Highlights:** AI-powered hints, Personalized study plans, Smart flashcards, Clean organization, Personalized dashboard, Detailed analytics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LeetCard Pro | $3.99 | per month |
| LeetCard Pro | $24.99 | per year |
| LeetCard Pro | $39.99 | one-time |


### System Design interview prep

[App page](https://appshunter.io/ios/app/system-design-interview-prep/id6756310915)

This app simulates system design interviews with an AI interrogator and interactive scenarios. Practice real-world architecture problems, receive instant feedback, and track your progress to ace your next tech interview.

**Highlights:** Interactive War Room for architecture scenarios, AI Interrogator challenges design decisions, Realistic system design interview questions, Daily practice drills for skill sharpening, Detailed performance analytics, Instant feedback and best practice learning

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $3.99 | per 7 days |
| Unlimited access | $4.99 | per 7 days |
| Unlimited access | $6.99 | per month |
| Unlimited access | $12.99 | per month |
| Unlimited access | $99.99 | per year |


## Frequently asked questions

### Is LeetCard free?

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

### Is System Design interview prep free?

System Design interview prep is free to download, with in-app purchases available.

### Which has better reviews, LeetCard or System Design interview prep?

LeetCard is rated higher. LeetCard averages 4.5 out of 5 from 80 ratings, while System Design interview prep averages 1.0 from 2 ratings.

### Do LeetCard or System Design interview prep have ads?

Both LeetCard and System Design interview prep show ads.

### Which is updated more often, LeetCard or System Design interview prep?

LeetCard ships an update every 2 days, and System Design interview prep monthly. Most recently, LeetCard was updated on October 9, 2026 and System Design interview prep on September 26, 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.*