# System Design interview prep vs Bitwise

The clearest difference is review sentiment: Bitwise at 100% against System Design interview prep's 0%. Bitwise also leads on rating (5.0 vs 1.0) and ads (none vs shown). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. System Design interview prep sells 5 in-app purchases, starting at $3.99 per 7 days and Bitwise sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Bitwise holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 0% of System Design interview prep's written reviews are positive against 100% of Bitwise's.

System Design interview prep ships an update monthly, Bitwise weekly. The most recent releases landed on September 26, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | System Design interview prep | Bitwise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/system-design-interview-prep/id6756310915/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bitwise-coding-interviews/id6806898386/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 89 MB | 11 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Abdelhak El Moussaoui](https://appshunter.io/developer/1827690433) | [Limit Point Software](https://appshunter.io/developer/377981570) |

## What reviewers say

### 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 |


### Bitwise

[App page](https://appshunter.io/ios/app/bitwise-coding-interviews/id6806898386)

Master coding interviews with short, daily practice sessions. Build solutions decision by decision, understanding the logic behind each step. Retain knowledge through spaced repetition and practice in your preferred programming language.

**Highlights:** Build solutions one decision at a time, Learn the thinking, not just the answer, Progress in minutes, Practice in multiple languages, Spaced repetition for retention, Interactive Code Builder puzzles

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership | $2.99 | per 7 days |
| Monthly Membership | $7.99 | per month |


## Frequently asked questions

### Is System Design interview prep free?

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

### Is Bitwise free?

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

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

Bitwise is rated higher. System Design interview prep averages 1.0 out of 5 from 2 ratings, while Bitwise averages 5.0 from 1 ratings.

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

System Design interview prep shows ads; Bitwise does not.

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

System Design interview prep ships an update monthly, and Bitwise weekly. Most recently, System Design interview prep was updated on September 26, 2026 and Bitwise on October 13, 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.*