Apps like Gradus: paid online surveys

Here are some great alternatives to Gradus: paid online surveys by Gradus Research Plus :
CoolSurveys: Surveys for Cash
CoolSurveys: Surveys for Cash
★4.7
Poll Cash - Paid Surveys
Poll Cash - Paid Surveys
★4.5
MultiPolls - Surveys on The Go
MultiPolls - Surveys on The Go
★4.5
Survey Rewards Cash Surveys
Survey Rewards Cash Surveys
★4.7
Appinio - Surveys for Rewards
Appinio - Surveys for Rewards
★4.4
HeyPiggy - Paid Surveys
HeyPiggy - Paid Surveys
★4.5
Eureka: Earn money for surveys
Eureka: Earn money for surveys
★4.5
Alpha Poll - Surveys for Cash
Alpha Poll - Surveys for Cash
★4.1
Survey Pop: Make money fast!
Survey Pop: Make money fast!
★4.6
Ipsos iSay Paid Survey Rewards
Ipsos iSay Paid Survey Rewards
★4.5
PollPe - Survey Rewards App
PollPe - Survey Rewards App
★4.0
CashKarma: Survey Rewards
CashKarma: Survey Rewards
★4.3
Surveys Queen - Paid Surveys
Surveys Queen - Paid Surveys
★4.1
Branded Surveys: Get Paid Cash
Branded Surveys: Get Paid Cash
★4.3
Poll Pay: Earn Money & Cash
Poll Pay: Earn Money & Cash
★4.4
Qmee: Paid Survey Cash Rewards
Qmee: Paid Survey Cash Rewards
★4.3