Chegg Prep is free, has millions of pre-made decks, and integrates with textbooks you're already using — so why did I find myself switching back to SmartRecall after two weeks?
TL;DR: Chegg Prep wins if you need instant access to textbook-aligned flashcards and don't care about retention science. SmartRecall is better if you're serious about long-term memory and want AI that actually understands what you're studying.
How I Evaluated Them
I used both tools daily for 15 days while reviewing medical terminology (about 300 cards total). I created some decks from scratch, imported others, and tracked how well each app helped me retain information. Here's what I measured:
- Spaced repetition quality — Does the algorithm actually work?
- AI features — Can it generate good cards or just generic ones?
- Textbook integration — How useful is Chegg's library?
- Mobile experience — Can I review on the subway?
- Pricing — What am I actually paying for?
- Long-term retention — Which one helped me remember more?
1. Spaced Repetition: Basic vs. Adaptive
Chegg Prep uses a simplified SM-2 algorithm — the same one Anki used in 2008. You rate cards as "Got it" or "Need more practice," and it schedules reviews accordingly. It works, but it's blunt. Every card you mark "Got it" gets the same interval bump regardless of how confident you actually were.
SmartRecall uses FSRS (Free Spaced Repetition Scheduler), which adapts to your actual performance patterns. It tracks not just whether you got a card right, but how quickly you answered, how many times you've seen it, and how your retention changes over time. After a week, I noticed SmartRecall was showing me cards right before I was about to forget them — Chegg Prep kept drilling me on things I already knew cold.
The difference showed up around day 10. Chegg Prep had me reviewing 45 cards that morning. SmartRecall showed me 28, but they were the exact ones I was shaky on. I spent less time reviewing and retained more.
One honest critique: SmartRecall's algorithm can feel aggressive early on. If you're cramming for an exam in 3 days, Chegg's simpler approach might feel less overwhelming.
2. AI Card Generation: Textbook Scraping vs. Contextual Understanding
Chegg Prep's AI feature pulls definitions straight from textbook content. You paste a paragraph, it spits out Q&A pairs. Fast, but shallow. When I fed it a section on cardiac physiology, it generated cards like:
- Q: "What is systole?" A: "The contraction phase of the heartbeat."
Technically correct, but not how I needed to think about it for my exam.
SmartRecall's AI asks follow-up questions. It generated:
- Q: "During systole, what happens to ventricular pressure and why does the AV valve close?" A: "Pressure rises above atrial pressure, forcing the AV valve shut to prevent backflow."
It connected concepts instead of just defining terms. The difference is that SmartRecall's AI is trained on how people actually learn, not just how textbooks are written.
Where Chegg wins: If you're studying from a specific textbook and just need vocabulary drills, Chegg's integration is faster. You can pull cards directly from your assigned chapters without thinking.
3. Textbook Integration: Chegg's Killer Feature (If You're in Undergrad)
This is Chegg Prep's strongest advantage. If you're using a popular textbook — especially in biology, chemistry, or psychology — there's a good chance someone has already made a deck for your exact chapters. I found three different decks for Campbell Biology, all organized by chapter and edition.
SmartRecall doesn't have this. You're either making cards yourself or importing from community decks (which are hit-or-miss). For a freshman taking intro courses, Chegg's library is genuinely valuable.
But here's the catch: Those pre-made decks are often bloated. The Campbell Bio deck I tried had 180 cards for a single chapter — way too many low-value definitions mixed with the important concepts. I spent more time sorting through noise than studying.
SmartRecall forces you to be intentional about what you're learning. That's harder upfront, but it means every card in your deck is something you actually need to know.
4. Mobile Experience: Functional vs. Polished
Both apps work on mobile. Chegg Prep's app feels like it was designed in 2019 — functional but clunky. Swiping through cards works, but the UI is cluttered with upsells for Chegg's other services (homework help, tutoring, textbook rentals). Every few cards, you get a banner reminding you to upgrade.
SmartRecall's mobile app is cleaner and faster. Offline mode actually works (Chegg's is buggy). The review interface is minimal — just the card, your answer options, and nothing else. I could knock out 20 cards in a 10-minute subway ride without friction.
One thing SmartRecall needs to fix: The mobile card editor is still rough. If I spot a typo mid-review, I have to switch to desktop to fix it. Chegg lets you edit on the fly.
5. Pricing: Free vs. $8/month
Chegg Prep is free if you already have a Chegg subscription ($15.95/month for homework help). Standalone, it's completely free with ads.
SmartRecall is $8/month or $60/year. No free tier beyond a 7-day trial.
Here's my take: If you're already paying for Chegg's homework help, Chegg Prep is a no-brainer add-on. But if you're only using it for flashcards, you're better off paying $8 for SmartRecall and getting a tool that's actually built for retention.
The value gap shows up over time. Chegg Prep is free, but I wasted hours reviewing cards I didn't need to see. SmartRecall costs money, but I spent 30% less time studying and remembered more. That's worth $8.
6. Long-Term Retention: Where the Algorithm Matters
After two weeks, I tested myself on the same 50 medical terms using both apps. I'd reviewed each term roughly the same number of times in both tools.
SmartRecall: 44/50 correct (88%)
Chegg Prep: 37/50 correct (74%)
The difference wasn't huge, but it was consistent. The cards I missed in Chegg Prep were ones I'd marked "Got it" multiple times but hadn't actually internalized. SmartRecall kept bringing them back until I really knew them.
This is the core difference: Chegg Prep optimizes for coverage (did you see all the cards?). SmartRecall optimizes for retention (can you actually recall this in three weeks?).
Final Verdict: Choose Based on Your Timeline
Use Chegg Prep if:
- You're in undergrad and your textbook is already in their library
- You need to cram for an exam in the next few days
- You're already paying for Chegg's other services
- You want zero friction — just open the app and start reviewing
Use SmartRecall if:
- You're studying for long-term retention (licensing exams, language learning, grad school)
- You want AI that generates conceptual cards, not just definitions
- You're willing to spend 10 minutes upfront to build better decks
- You care about studying efficiently, not just studying a lot
The honest truth: Chegg Prep is good enough for most college students. It's free, it works, and it has the decks you need. But if you're serious about remembering what you study — not just passing the next quiz — SmartRecall's algorithm and AI are worth the $8/month.
I'm sticking with SmartRecall for my medical boards prep. The time I save by reviewing smarter pays for itself in the first week.
