This review from pcmag.com who do extensive test on many softwares
PROS
Attractive user interface. Includes optimization and privacy clean-up tools.
CONS
Worst test results for malware removal. Worst test results for protecting a clean system against malware attack. Quarantined a number of verifiably valid Windows component files, luckily nothing critical.
BOTTOM LINE
Where some antivirus products excel at malware removal and others at preventing new attacks, Anvi Smart Defender is consistently terrible at both. Worse, in testing it quarantined a number of verifiably clean Windows files. Avoid it at all costs.