KURAUDOU - Cloud Sim

KURAUDOU is a hands-on cloud architecture simulator that helps you understand how AWS services connect and behave. Build a topology, send requests, and watch them flow.

Who it's for
- Cloud beginners who want to visualize service relationships
- AWS certification candidates connecting diagrams to actual behavior
- Engineers explaining architectures to teammates
- PAKEDOU users ready for the next step beyond networking

Features
- 16 AWS services - tap to place, drag to move
USER / Route 53 / CloudFront / WAF / API Gateway / ELB / EC2 / Lambda / Auto Scaling Group / RDS / S3 / ElastiCache / SQS / SNS / NAT Gateway / Internet Gateway
- Animated packet flow between services
- Auto-send mode - detects entry/exit from your graph and runs continuously
- Auto Scaling (Pro) - EC2 instance count grows and shrinks under load
- Failover - simulate outages and recovery
- Cost calculator - rough hourly cost of your topology
- Save/load topology by name - free: 1 slot, Pro: 5 slots
- Easy / Real mode - concise logs in your language vs. detailed English technical logs
- Per-service config - rate limits (Pro), cache TTL, scaling thresholds (Pro), etc.
- Error guide - explains why a request was dropped and how to fix it
- Available in 77 languages (follows your device language)

Pro upgrade
- All 16 services unlocked
- Unlimited resource placement (free: 5)
- 5 save slots (free: 1)
- Ads removed

Free tier
USER / CloudFront / ELB / EC2 / RDS / S3 - enough to learn typical 3-tier patterns.

Check out our companion app, PAKEDOU, for network protocol learning.