Two Ways to Keep Score
Most net worth tools ask for your bank credentials so they can pull balances automatically. The pitch is convenience: connect once, and the numbers keep themselves current. Brevizo takes the other approach. You enter your figures yourself.
Both get you to a total. They differ in what you hand over and what you notice along the way.
The Case for Linking
Automatic feeds save time and remove the chance of a typo in a balance. If you hold accounts at a dozen institutions, that is genuinely useful. The tradeoff is that a third party holds access to your accounts, connections break when banks change their systems, and manual holdings like a car or a private investment still have to be entered by hand anyway.
Automation also encourages checking daily, which turns a long term measure into a source of noise.
The Case for Entering It Yourself
Manual entry takes a few minutes a month and gives you no credentials to share, no connections to repair, and no feed to trust. Typing the numbers also forces you to look at them, which is most of the value. People who update by hand tend to know their own balance sheet in a way that people watching an auto synced dashboard do not.
Conclusion
Neither method is more accurate than the other, since both depend on the figures being right. Pick the one whose tradeoff you can live with. Brevizo picked manual because a monthly snapshot does not need bank access to be honest.