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Race to 1,000 students

Homework that ends. Misses that return.

Start free in 10 seconds. No card. Invite a friend and they get 14 days of Thrifty — you earn 7 more once they complete three learning sessions across two days.

Start freeGoogle sign-in · ~10 seconds

What happens after you sign up

  1. 1

    Sign in with Google

    About 10 seconds. No credit card, no forms, nothing to cancel.

  2. 2

    Snap tonight's hardest problem

    Photo or typed. You get a plain-words explanation, then a quick quiz on it.

  3. 3

    Let it remember the weak spot

    The exact step you missed comes back a few days later, right before you'd forget it.

Sugar, the LemonSugar Ai mascot

How to refer someone

  1. 1

    Open your invite page

    Me → Invite. Your personal link is already there, with WhatsApp, Message, Email and QR buttons.

  2. 2

    Send it to real people, one at a time

    Parents and classmates who actually have homework tonight. One good 1:1 message beats a group blast every time.

  3. 3

    They get 14 days, you earn 7

    They get 14 days of Thrifty the moment they sign up with your link. You earn 7 more once they complete three learning sessions across two different days.

Fair-use limits: referral rewards are capped at 5 rewarded referrals in any 30 days and 180 free days in total per account. Your friend always gets their full 14 days, and every referral still counts toward your total.

Ready when your homework is.

Take a photo of the problem you're stuck on right now. That's the moment it clicks.

Sign up free