I experienced a minor glitch when entering a new bond that had earned no interest. I reported the problem and received a very prompt response from the developer, who had the problem fixed in short order. Bravo!
Suggestions:
1. If a serial number for a bond is available, there should be a way to enter and store it.
2. The current interest rate for any given bond should be displayed.
3. The to-date percentage yield for each bond should be displayed.
CChumbles about Savings Bond Calculator