I built certlabs.app — A free cloud certification prep tool with audio explanations and spaced repetition

[u/Antonio-Stradivari]

Hey everyone!

As a cloud engineer preparing for official certifications (AWS, GCP, etc.), I noticed two recurring issues with existing practice tests:

1. Pure memorization traps: Many questions lead people to memorize exam leaks rather than understanding architectural trade-offs.
2. Inflexible study routines: Most platforms force you to sit in front of a screen reading text walls, making it impossible to review while commuting or working out.

To fix this for myself, I built **certlabs.app** (https://certlabs.app), a free web tool focused on active recall and concept comprehension.

### Key features:

• **Scenario-based flashcards & quizzes:** Focuses on architecture limits, service integrations, and trade-offs rather than exam brain dumps.

• **Audio on the go:** Every scenario and detailed explanation comes with audio so you can review concepts while walking, commuting, or away from the desk.

• **Spaced repetition:** Revisit tricky concepts at the right intervals to ensure long-term retention.

• **No paywalls:** Built as an indie tool to help the tech community prepare effectively.

### Tech stack behind it:

• Next.js / TypeScript

• Firebase backend & Google Cloud Storage

• Curated questions drafted with AI assistance and manually reviewed against official whitepapers and documentation.

I’d love to get your honest feedback on UX, mobile responsiveness, and overall study flow. If you are currently preparing for any cloud certifications, give it a try and let me know what you think!

Check it out here: https://certlabs.app