Ethereum Block Alarm
The Ethereum blockchain adds blocks at a rate of about 10 seconds/block. Some contracts need things to happen at a certain block height, and this tool can help track when that should be happening.
This application is deployed on IPFS under the hash QmdikpwcyeBuGaVzWzSzPuqvBfTGD8jPAVydcCjYHsBUxo