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The two options, defined
A subscription revision site charges you for access to a platform. You pay each billing period and use everything on your plan while the subscription runs. Stop paying and the paid access ends.
Save My Exams is one example. Its help page describes three tiers: Free, Essential and Premium. One paid plan covers every subject on the site. If you cancel, you keep paid access to the end of the billing period, then the account goes back to Free.
A one-time PDF is a file you buy once and keep. Glide sells its notes this way: $10 per subject, or $12 with the formula sheet for Chemistry, Physics and Maths. The same notes are free to read on the web, topic by topic.
Subscription sites: pros and cons
- Practice tools can come with the notes; Save My Exams’ paid plans add unlimited exam questions and mock exams
- One plan can cover all your subjects, which helps if you take many
- A web platform can be updated without you buying again
- Some plans offer a free trial; Save My Exams offers 7 days on Premium
- You pay for as long as you use it, including months you barely log in
- Paid access ends when you stop paying; Save My Exams then returns the account to Free
- Free tiers can be capped; Save My Exams’ free tier is a weekly allowance of notes
- Offline use may need a higher plan; Save My Exams’ PDF downloads are a Premium feature
Save My Exams details from their help page, checked 21 October 2026. Other subscription sites set their own terms.
A one-time PDF: pros and cons
- Pay once; no renewals to remember or cancel
- The file is yours: print it, write on it, revise with no signal or data
- The cost is known up front, which makes it easy to budget
- With Glide, the web notes are free, so you can read before you buy
- Notes only: no question bank, mock exams or answer marking, so you still need past papers
- A PDF is a snapshot. If a syllabus changes, your copy does not update itself
- You pay per subject, so many subjects add up
- Once downloaded, a refund is not automatic (Glide reviews these case by case)
The snapshot point matters more than it sounds. Cambridge syllabuses run for a set range of exam years. Physics 0625, for example, is for exams in 2026, 2027 and 2028. A new IGCSE Business syllabus, 0264, is for exams in 2027 to 2029. Before buying any PDF, check which syllabus and exam years it was written for.
Glide itself has limits beyond the format. It covers Cambridge IGCSE only, in seven subjects, and it is a newer site than the large subscription platforms. On the plus side, a refund is automatic if you have not downloaded the PDF, and always given if the file is faulty.
Work out your own cost
We cannot quote a fair subscription price for you: prices vary by plan and by country. So turn it round. Divide a one-time price by the months you will revise. A subscription is cheaper only if its monthly cost is below that figure.
| One-time Glide purchase | Price | Over 3 months | Over 6 months | Over 9 months |
|---|---|---|---|---|
| One subject, notes PDF | $10 | $3.33 a month | $1.67 a month | $1.11 a month |
| One subject, notes + formula sheet | $12 | $4.00 a month | $2.00 a month | $1.33 a month |
| Two subjects, notes PDFs | $20 | $6.67 a month | $3.33 a month | $2.22 a month |
| Three subjects, notes PDFs (10% off) | $27 | $9.00 a month | $4.50 a month | $3.00 a month |
Each figure is the one-time price divided by the number of months. Glide prices as listed on glidenotes.org, in US dollars; buying three or more items in the cart takes 10% off. Formula sheet combo for Chemistry, Physics and Maths only.
Two cautions keep this fair. First, a subscription can cover every subject on the site, so the more subjects you take, the better it can compare on price. Second, the comparison is not like for like. A subscription can include practice questions; the PDF does not. Compare the cost of what you would actually use.
Who each one suits
Neither format is better in general. Each fits a different kind of student.
- You learn best by doing many exam questions by topic
- You take many subjects and want one account for all of them
- You will use it every week until your exams
- You want notes to keep, print and annotate
- You want offline notes without a subscription
- You take a few subjects and dislike renewals
- Your budget is tight
- You have not yet found where your marks go
- You want to try a resource before paying for it
What we would do
We sell one of the options, so weigh this with that in mind. Here is the order we would follow.
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Start free
Read one topic in the free Glide web notes and use a subscription site’s free tier for the same topic. See which way of learning suits you.
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Find where your marks go
Sit one past paper and mark it with the mark scheme. Note whether you lost marks on knowing the content or on applying it.
Tip. Content gaps point to notes. Application gaps point to practice questions. -
Pay for the gap
Need far more practice questions than past papers give you? Then a subscription for those months may be worth it. Need notes to own and print? Then buy the PDF.
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Check before you buy
Confirm the syllabus code and exam years. For a subscription, read the plan terms and note when to cancel. For a PDF, check the refund terms.