Subscription Cost Calculator: Compare Billing Intervals Fairly
Turn weekly, monthly, quarterly and annual charges into one monthly equivalent before comparing AI companion plans.
Start with the amount that will actually be charged
Use the final checkout amount in your currency, not a promotional headline. Add any tax or fee shown before payment. If the first term is discounted, record both the first charge and the later renewal amount. A useful comparison separates the introductory period from the ongoing agreement so a temporary saving does not disguise the normal cost.
Put every interval on the same clock
A weekly charge repeats about 52 times each year, while a monthly charge repeats 12 times. Quarterly plans repeat four times, and annual plans once. Convert each option to both a monthly equivalent and a full-year total. Do not multiply a weekly price by four; most months contain more than exactly four weeks.
Treat annual savings as a commitment
An annual plan can have a lower monthly equivalent while requiring much more money upfront. Ask whether you are comfortable losing flexibility if your interests change. Compare the saving with the value of being able to leave after one month. The cheapest equivalent is not automatically the best personal choice.
Keep extras outside the base plan
Image, voice and video use may rely on a separate balance. First calculate recurring access, then model extra use on another line. Combining everything into one guessed number hides which part of the plan creates the cost. A clear model lets you reduce optional use without confusing it with the subscription itself.
Date and save your inputs
Plans and promotions change. Save the checkout page, currency, interval, renewal amount and date used in your calculation. Revisit the figures before renewal. This site intentionally does not supply current prices because your own checkout is the strongest evidence for your account, region and chosen offer.
A quick comparison routine
Calculate the first 30 days, the next normal month and the first full year. Then ask three questions: can I afford the upfront charge, will I still use the service after the discount, and does the longer commitment save enough to justify reduced flexibility? Those answers matter more than a large percentage badge.
A practical worksheet
Open two blank notes and label them short commitment and long commitment. Copy the exact first charge, normal renewal, interval, currency and visible fees into each note. Calculate the amount due in the first 30 days and first full year, then write one sentence about the flexibility you give up in exchange for any saving. Add the cancellation route and review date. If a value is not visible, mark it unresolved and do not let the lower headline amount decide the comparison. Revisit the worksheet after one month of real use before extending the commitment.