Can you please suggest a good budgeting app?

Yes, budgeting apps are definitely useful. You can keep a track of your finances on the go. You can take its help whenever you want to. You can search online and select a good budgeting app as per your convenience. Just make sure it's a reliable one.
You can select budgeting apps from Mint, YNAB, etc.

Yes, budgeting apps are easy to manage. You just need to put the figure, the app will calculate it. You will also be given suggestions and tips to get a better result. Stat with a free budgeting app to get used to it.

Personal Capital, Good Budget, Wally, Acorns - these are some good budgeting apps you can use. Digit is also good but you have to pay a monthly fee of $2.99. But it's for the first 30 days. Personal Capital is better for comprehensive investment management. Its fee is 0.89% for managed assets. Mint is a free budgeting app and a good one. You can use that also.