# Blog posts from April 2012

* [New features: Assembly Replays & cost tracking](/blog/2012/04/more-features-assembly-cost-replay-api-calls-and-custom-params-fields.md)
* [Transloadit adopts Twitter Bootstrap for web upgrade](/blog/2012/04/converting-to-twitter-bootstrap.md)
* [Introducing Assembly Rate Limiting for enhanced stability](/blog/2012/04/introducing-rate-limiting.md)
* [Discontinuing real-time encoding due to growth](/blog/2012/04/removing-support-for-realtime-encoding.md)
* [All Robots now support expanded Assembly Variables](/blog/2012/04/assembly-variables-available-everywhere-now.md)