OnePrep is a solid free starting point. Acely gives you more practice, a personalized study plan, and an AI tutor to help you improve as you retest.
OnePrep's free plan is a good source of extra practice questions, and its one-time passes are a low-cost way to cram before a single test date. But a quick cram and a long-term prep plan aren't the same thing. Acely is built to help you reach your goal score, with 50 full-length SAT & ACT tests, a study plan that updates after every session, and short instant hints that get you unstuck so you can keep moving. And if you're taking the ACT or still deciding which test is right for you, Acely is an ACT preferred test prep provider with official ACT content.
Compare Acely to OnePrep to see how they stack up.
Starting price*
$149/month
$115 per SAT-date pass
Annual price
$588/year
About $780/year (website Pro)
SAT practice tests
30
1 Lite / 10 Pro
ACT practice tests
20
2 Lite / 5 Pro
Practice questions
15,000+
6,000+
Official ACT content
Included
Not offered
Personalized study plan
Updates every session
Tied to a specific test date
Instant hints
Probing questions to get unstuck
Not offered
AI tutor
All plans, no weekly limits
Weekly orb limits on free and Lite
*Acely: Free plan includes a skills assessment, one full-length SAT test, one full-length ACT test, and 10 practice questions. A 3-day trial is also available for full access to all of Acely's features.
*OnePrep: Free plan includes limited questions and 10 AI orbs per week.
*OnePrep details checked October 30, 2026, and do not include any short-term promotions OnePrep may be running.
A closer look at the areas that matter most for test prep.
OnePrep’s free plan is generous. It gives you SAT, ACT, and AP practice questions and a weekly allowance of AI help without a credit card. And if your test is just a few weeks away, its paid passes are a low one-time cost for some last-minute practice before a single test date. But if you’re starting months ahead, working toward a big score improvement, or planning to retake the test, you’ll want more opportunities to practice and a plan that adapts as you improve. That’s where Acely comes in.
50 full-length tests vs. 15 on OnePrep Pro. Full-length tests help you build stamina, improve pacing, and get comfortable with test day. Acely includes 30 SAT and 20 ACT full-length tests in every plan. OnePrep Pro includes 10 SAT and 5 ACT tests, while Lite includes 1 SAT and 2 ACT tests. With Acely, you have more opportunities to put your skills to the test, learn from your mistakes, and build confidence before test day. And if your first score isn’t where you want it to be, you have plenty of practice left for your next attempt.
Don’t settle for limited ACT prep. Acely is an ACT preferred test prep provider with official ACT content, 20 full-length ACT tests, and 6,000 ACT questions. OnePrep Pro includes 5 full-length ACT tests. If the ACT is on your list, or you haven’t decided which test to take, Acely gives you the resources to prepare for both exams in one place, without a second purchase.
Your prep shouldn’t end after one test date. OnePrep does offer longer subscriptions, but its website pricing still emphasizes single-test Exam Passes built around a specific SAT date. That works for a quick cram, but many students take the test more than once, and many colleges superscore, so every retake can be another opportunity to improve their best section scores. Acely is built for that longer journey: your personalized study plan, progress, and score predictions carry forward through every retake, so you can pick up where you left off and keep working toward your superscore.
When you hit a wall mid-question, Acely gives you a short, instant hint that asks a probing question to get you thinking again. You can grab one as soon as you need it, get unstuck, and keep moving at your own pace without waiting on a long AI reply. OnePrep doesn’t have a dedicated hint flow. Ask Preppy typically returns a long block of generated text, or you can open the full explanation before you’ve even tried the question.
Practice with questions created by test prep experts. Every Acely practice question and explanation is written and reviewed by test prep experts, never generated on the fly. That means you get practice designed around the real test’s format and difficulty, with explanations to help you understand the reasoning behind each answer. Instead of just moving on after a wrong answer, you can learn from it, strengthen your understanding, and apply that knowledge to the next question.
More practice, official ACT content, and a plan that lasts through every retake
50 full-length SAT & ACT tests
Vs. 15 on OnePrep Pro (30 SAT + 20 ACT on Acely)
Official ACT content
20 full-length ACT tests and 6,000 ACT questions
Instant hints + an AI tutor in every plan
Probing hints to get unstuck, with no weekly orb limits
A personalized study plan
Updates after every session and carries through every retake
Score predictions within 20 points
Know where you stand as you work toward your goal score
Score-improvement guarantee
SAT 200+ points or ACT 5+ points, subject to eligibility. Covers both exams
Trusted by 60,000+ students
Named one of TIME’s Best Inventions of 2026
Real results from students who chose Acely for structured, long-term prep.
Although my daily practice was super long, I really think it helped me get the score I wanted. I went up from a 950 to a 1260 on the SAT, and from a 20 to a 28 on the ACT. I really enjoyed the layout of the program, and it was completely worth the money, especially if you get the multiple-month plan.
Acely Student
This site really helped me. I needed to score a 1330 on the SAT for Florida Bright Futures, and this website helped me so much that on the October 3rd SAT, I scored a 1410. I am really happy, and this site has my absolute thanks for my score.
Acely SAT Student
I loved the practice questions, I thought they were so helpful. I went up 6 points in 1.5 months with Acely. The personalized plan they offered made Acely even more worth it. I recommend this platform for any upcoming ACT test takers!
Acely ACT Student
For one SAT date on a tight budget, OnePrep's Exam Passes cost less upfront. OnePrep's website Pro list price is about $780/year ($65/month). Acely's annual plan is $588. With Acely, you get SAT and ACT prep with continued access through retakes.
Acely
$49/mo
$588 billed annually, or $149/month. Quarterly plans are $99/month, billed every 3 months.
Annual price
$588/year
SAT practice tests
30
ACT practice tests
20
Practice questions
15,000+
Official ACT content
Included
AI tutor access
All plans, no weekly limits
Instant hints
Probing questions to get unstuck
Free plan
1 SAT, 1 ACT + 10 questions
Free trial
3 days
OnePrep
From $115
Website pricing emphasizes Exam Passes for a specific SAT date. Longer subscriptions also available.
Annual price
About $780/year (website Pro)
SAT practice tests
1 Lite / 10 Pro
ACT practice tests
2 Lite / 5 Pro
Practice questions
6,000+
Official ACT content
Not offered
AI tutor access
Weekly orb limits on free and Lite
Instant hints
Not offered
Free plan
Limited questions + 10 AI orbs/week
Free trial
Not offered
*OnePrep details checked October 30, 2026, and do not include any short-term promotions OnePrep may be running.
The College Board and ACT recommend taking the test at least twice. Acely gives you the tools to hit your superscore.