In the past I have quite often used the free version of TweetReach to see how far a message has moved. The free version looks at just 50 tweets and is often quite interesting. However, tomorrow I am speaking at the LGInsight Acadamy event in Nottingham and I thought it would be good to look at the reach of the #TestItTuesday campaign (Fire and Rescue Services around the UK tweet #TestitTuesday messages every week to improve the awareness of the need to check smoke and carbon monoxide alarms). So on this occasion I paid my US$20 and boght the paid for report.
As you can see by the image below, the full report is really useful, as well as showing that 172 Tweets in the last 7 days reached just over 89000 people the report shows the composition of the tweets, retweets, and replies and it lists all of the Tweets and the people who tweeted them.
$20 is a bit of a steep price I feel, but the full report is definitely more useful than just the last 50 tweets, which is what the free report gives you.