The Daily Dev
Master System Design
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
System design is becoming one of the most important skills for software engineers. Many companies now require a dedicated system design interview, and your career growth often depends on your ability to design large-scale systems. The Daily Dev gives you one focused system design question every day across databases, infrastructure, APIs, theory, and product to help you learn these skills and stay sharp. Each question takes about two minutes, and includes a resource to learn more about the subject.
What you’ll get:
• A new system design question daily
• Clear explanations for every answer
• Breakdown of the correct answer
• Access to previous questions
• Linked resources to go deeper
• Access to a private community of developers learning and building the same things as you
• Progress tracking to monitor growth
If you’re preparing for interviews, this builds daily momentum.
If you’re already working as an engineer, this keeps your fundamentals sharp.
Open the app. Answer one question. Land the offer.
* All features described above require a subscription
Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
small copy updates
bug fixes
The developer, Arjay McCandless LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Arjay McCandless LLC
- Size
- 16.2 MB
- Category
- Education
- Compatibility
Requires iOS 17.5 or later.
- iPhone
Requires iOS 17.5 or later. - iPad
Requires iPadOS 17.5 or later. - Mac
Requires macOS 14.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.2 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- In-App Purchases
Yes
- Monthly Daily Dev Subscription $8.99
- Annual Daily Dev Subscription $59.99
- Copyright
- © 2025 Arjay McCandless LLC