When comparing SmartAmount vs Home Budget with Sync, the Slant community recommends Home Budget with Sync for most people. In the question“What are the best personal finance tracker apps for Android? ” Home Budget with Sync is ranked 10th while SmartAmount is ranked 18th. The most important reason people chose Home Budget with Sync is:
You only have to enter your Dropbox sign-in data and backups will happen automatically.
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Pros

Pro Original
SmartAmount has interesting original features, like future fund prediction.

Pro Simple
Unlike other money focused apps, this one is very simple to use and can be learned in few minutes.

Pro Requires only a small bit of time
Users can initially add all recurring incomes and expenses to have a rough estimate. If users forget to register occurrences for long period of time, that is not an issue as all that needs done is for the user to set their current amount and the app will adapt all of its charts and statistics.

Pro Secure
All data is encrypted, and there is a built in user set password.

Pro World-wide availability and currency support
App is available in all world countries, and supports all world currencies.

Pro Chart to see your FUTURE balance
You can easily see how next expenses change your future money availability. You can see it graphically (by chart), or through calendar view

Pro Backup and restore
You can backup in text format (JSON) so you really OWN your data, and you can read it directly from file, if needed
Pro Backup to Dropbox automatically in regular intervals
You only have to enter your Dropbox sign-in data and backups will happen automatically.
Pro There is a free (lite) version for you to try before you buy
Free version does not have the option to synchronize across multiple devices, but you can try all the options.
Pro Easy to use, fast to enter data
You even have Android widget that helps you enter your expenses in 4 taps (start, amount, account, expense category).
Pro Multiple accounts, multiple expense categories and subcategories
You can have as many accounts you want (and you can group them - either by currency or by type: credit cards, cash/wallets/envelopes), as many expense categories you want and subcategories (only 1 level in depth).
Pro Multiple platforms
Android, iOS, MacOS, Windows, Kindle.
Pro You can set up multiple user accounts
The whole family uses the same database which synchronizes in the background.
Cons
Con Unstable
App last updated January 2017, which is causing issues with Google Play Services repeatedly crashing.
Con Mixing different currencies in reports
It has a problem with adding up amounts in different currencies when making reports.
Con Very few reports
Reports are very simple, but you can export data (send to e-mail) into CSV format and use some reporting tool like Power BI (which is free and very powerful) to make your own reports.
Con Windows PC version is too expensive and doesn't have that many options
$14.99 is too much for nothing to add to the smartphone version.
