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HeyFriday vs Write Brain

Official pricing (checked 2026-10-25, 2026-09-23) computed at the same usage levels. 1 USD = 1,323.9 KRW.

One side has a plan that cannot be converted to usage, so no winner is called per band. Compare the monthly prices in the table below.
At 3 How many people will use it (3 people)
HeyFriday
No plan
Write Brain
No plan
One side has a plan that cannot be converted to usage, so no winner is called per band. Compare the monthly prices in the table below.

Monthly cost by usage

Which side is cheaper at light, typical and heavy use. Each cell is the cheapest plan that covers that amount.

How many people will use itHeyFridayWrite BrainCheaper
Just me (1)No planNo plan-
3 people (3)No planNo plan-
10 people (10)No planNo plan-

For your exact usage, use the AI writing calculator.

At a glance

  • Entry prices: HeyFriday Free Trial at $0/mo (about ₩0), Write Brain Essential Writer at $5/mo (about ₩6,600).
  • At just me usage (1 seats) neither has a public plan that covers it, or the unit cannot be converted.
  • At 3 people usage (3 seats) neither has a public plan that covers it, or the unit cannot be converted.
  • At 10 people usage (10 seats) neither has a public plan that covers it, or the unit cannot be converted.
  • Both have free plans (HeyFriday Free Trial, Write Brain Entry Writer).

HeyFriday pricing

HeyFriday is an AI copywriting tool with 40+ templates and text rewriting and expansion features that helps you create content 5x faster. Tool page

  • Free Trial

    $0

    -

    20 generations per month, 5-day full refund guarantee

  • Free TrialCheapest paid

    $0/mo

    In KRW
    ₩0
    Included / month
    -

    20 generations per month

  • PRO

    $19/mo

    In KRW
    ₩25,200
    Annual billing
    $15.75
    Included / month
    200,000 words

    200,000 words per month, $189 billed annually in one payment

  • POWER

    $59/mo

    In KRW
    ₩78,100
    Annual billing
    $33.25
    Included / month
    Unlimited

    Unlimited words (FUP), $399 billed annually in one payment

1 USD = 1,323.9 KRW (2026-10-27). Checked on the official pricing page on 2026-10-25. Bold values are monthly-billing prices; taxes and payment fees excluded.

Write Brain pricing

Write Brain is a writing tool priced by the number of edits. You get 30 free edits a month, and you can also buy 300- or 900-edit packs on their own without a subscription. Tool page

  • Entry Writer

    $0

    30 credits

    30 edits/month

  • Essential WriterCheapest paid

    $5/mo

    In KRW
    ₩6,600
    Annual billing
    $4.17
    Included / month
    300 credits

    300 edits/month, $50/year billed annually, tax not included

  • Extensive Writer

    $19/mo

    In KRW
    ₩25,200
    Annual billing
    $15.83
    Included / month
    Unlimited

    Unlimited edits, $190/year billed annually, tax not included

1 USD = 1,323.9 KRW (2026-10-27). Checked on the official pricing page on 2026-09-23. Bold values are monthly-billing prices; taxes and payment fees excluded.

FAQ

HeyFriday or Write Brain: which is cheaper?
At just me usage (1 seats) neither has a public plan that covers it, or the unit cannot be converted. At 3 people usage (3 seats) neither has a public plan that covers it, or the unit cannot be converted. At 10 people usage (10 seats) neither has a public plan that covers it, or the unit cannot be converted.
Do HeyFriday and Write Brain have free plans?
Both have free plans (HeyFriday Free Trial, Write Brain Entry Writer).
What are the entry prices of HeyFriday and Write Brain?
Entry prices: HeyFriday Free Trial at $0/mo (about ₩0), Write Brain Essential Writer at $5/mo (about ₩6,600).
How this is calculated

How this is calculated

  1. 1KRW is converted at 1 USD = 1,323.9 KRW as at 2026-10-27. The rate is refreshed daily.
  2. 2Monthly cost is the monthly-billing price of the cheapest plan that covers the usage entered. Overage is added only where the official page states an overage rate; a plan whose allowance is exceeded with no stated overage is left out of the ranking.
  3. 3Credit-based tools are converted using the credits-per-unit figure printed on the official page. Tools whose credit cost varies by model, with no official conversion published, are excluded from the ranking and listed separately.
  4. 4The per-unit price is the plan's monthly price divided by its monthly allowance. Unlimited plans show none, as there is nothing to divide by.
  5. 5A 원고지 sheet is 200 characters; an A4 page is taken as 1,800 characters at 10pt with 160% line spacing.
  6. 6Prices are as published by the vendor. VAT, card issuers' foreign-transaction fees and the rate applied on a KRW settlement are excluded. Regional pricing and temporary promotions may not be reflected.
  7. 7Paying in dollars by card means your issuer adds its own exchange rate and a foreign-transaction fee, typically 1-2% of the amount. That figure depends on the issuer and the moment of payment, so Wolmma cannot know it and does not include it.

Disclaimer

Wolmma is an information site that collects prices from each tool's official pricing page. We may hold an affiliate relationship with a vendor, but we are neither the seller nor its agent.

We verify as carefully as we can, but a displayed price, allowance or conversion may differ from what you are actually charged, because of plan changes, regional policy, promotions or tax. Confirm the final amount on the official page before you pay.

These figures are reference information, not a recommendation or advice to buy. Wolmma accepts no liability for loss arising from a purchase or contract entered into on the basis of this information.

What your card is actually billed will differ from the figure shown, according to your issuer's exchange rate, its foreign-transaction fee and local tax. None of that is within our sight or control, and we accept no liability for it. Payment, refunds and plan changes are a contract between you and the vendor, to which the Company is not a party.

If a price is wrong, write to connect@aiyogeum.com. We check it, correct it, and record the correction in the change log.