ThetaScan.io

What it does

Keeps a record of all Guardian and Validator staking rewards and allows a user to download them by year in csv format.
Allows a Guardian or Validator node to be monitored via smartphone and will alert the user if the node misses a block or has a withdraw.
Tracks historical data like the average amount of Theta that is staked for each month and how many nodes are online.
Keeps a record and makes searchable all TNT-20 Tokens and transactions.
Keeps a record of all Theta and TFuel sent across the blockchain and allows a user to download the transactions of an address in csv format.
Allows anyone to see the top 100 Theta and TFuel transactions by 24 hours, 7 days, or 30 days.
Has an API that allows interaction with the blockchain and can get historical data like the price of Theta on any given day.

Database Speed, after the coinbase transactions hit 100 million plus the databases need to be redesigned. After lots of trial and error I was able to get, Select requests down to fractions of a second for the average user request.

The growing numbers of users. Unique user traffic has been increasing by a rate of roughly 4 times month over month for the last 3 months.

I will continue to develop and add new features. One thing that I do is read through the slack room and add to the site features that I see people asking about.
Edge Node data and monitoring features.
Further TNT-20 token build out features.