Retain
AI flashcard app that turns uploaded study material into exam questions and a learning plan
Overview
Retain (retain.cards): AI flashcard app that turns uploaded study material into exam questions and a learning plan. Category on TopCheckouts: Education & exams.
In September 2026, Similarweb estimates about 12,894 visits went from Retain to a checkout payment page — 270 of the 607 sites we track. That is 228% up from the April–June monthly average of 3,933.
Total website visits that month were about 76,014 (Similarweb 3-month total, split by Semrush monthly trend). Roughly 17.0 of every 100 visits reached the checkout page.
Largest September traffic sources: direct 71%, search 29%. (undefined)
New users mostly come from the product spreading itself: the site shows shareable results, and direct plus brand search is about 100%. Most new users are brought in by existing ones.
Pricing: no public price found on the site — it may appear after login or inside the app.
Checkout visits over time
By checkout
| Checkout | Apr–Jun avg | Jul | Aug | Sep |
|---|---|---|---|---|
| checkout.stripe.com | 3,933 | 0 | 4,712 | 12,894 |
Similarweb referral data; months derived from 1/2/3/6-month shares.
Website traffic & engagement
Traffic sources
Semrush source breakdown (desktop)
How the new-user source is computed
Direct + brand search 100.0% · Direct and brand search count as viral only when the site shows sharing mechanics; the largest share wins, under 5% means Other.
Search & AI
Social & referrals
Visitor countries
Product & pricing
“Easily share your decks and flashcards with just a link. Anyone who has this link will be able to clone your deck.”From the site
FAQ
How many checkout visits does Retain get per month?
In September 2026, Similarweb estimates about 12,894 visits went from Retain to a checkout payment page — 270 of the 607 sites we track. That is 228% up from the April–June monthly average of 3,933.
Where do Retain's new users come from?
New users mostly come from the product spreading itself: the site shows shareable results, and direct plus brand search is about 100%. Most new users are brought in by existing ones.
How does Retain charge?
Pricing: no public price found on the site — it may appear after login or inside the app.
Similar sites
About the data
Checkout visits are Similarweb's estimate of visits from this site to a checkout payment page; opening checkout is not paying, so this is not revenue. For how September site visits and source shares are computed see the notes at the bottom of the homepage. Data updated 2026-10-21.