Moodle might be a bit more popular than RingCaptcha. We know about 1 link to it since March 2021 and only 1 link to RingCaptcha. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Ringcaptcha.com — Tools to use phone number as id, available for free. - Source: dev.to / almost 3 years ago
Moodle can handle this but it might be overkill for your requirements. Once you have it setup though the quiz feature is really great, and the analytics it provides are awesome. Source: about 1 year ago
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