Devi AI vs Let Me Know When
Official pricing (checked 2026-10-25, 2026-10-26) computed at the same usage levels. 1 USD = 1,323.9 KRW.
- At 3 People using it (3 people)
Devi AI
- ₩54,100
- Yearly Deal, $40.84/mo
Let Me Know When- 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.
| People using it | Devi AI | Let Me Know When | Cheaper |
|---|---|---|---|
| Just me (1) | $40.84 Yearly Deal, ₩54,100 | No plan | Devi AI |
| 3 people (3) | $40.84 Yearly Deal, ₩54,100 | No plan | Devi AI |
| 10 people (10) | $40.84 Yearly Deal, ₩54,100 | No plan | Devi AI |
For your exact usage, use the AI marketing calculator.
At a glance
- Entry prices: Devi AI Yearly Deal at $40.84/mo (about ₩54,100), Let Me Know When Basic at $3.99/mo (about ₩5,300).
- At just me usage, Devi AI (Yearly Deal, $40.84) is the only one with a public plan that covers it.
- At 3 people usage, Devi AI (Yearly Deal, $40.84) is the only one with a public plan that covers it.
- At 10 people usage, Devi AI (Yearly Deal, $40.84) is the only one with a public plan that covers it.
- Neither has a free plan.
Devi AI pricing
Devi AI is a lead generation tool that monitors social platforms such as Facebook groups, LinkedIn, and X to find potential customers with purchase intent, then responds automatically using AI. Tool page
| Plan | Monthly | Annual billing | KRW | Included / month | Notes |
|---|---|---|---|---|---|
| Monthly Deal | $49.01 | $41.29 | ₩64,900 | - | Official page lists 64,884 KRW. ₩64,883.8 per month. 10-day trial ₩1,324.2. Monitors 25 Facebook groups. |
| Yearly DealCheapest paid | $40.84annual billing only | $40.84 | ₩54,100 | - | Official page lists 54,074 KRW. ₩648,838.5 billed once per year (monthly equivalent). 2 months free. |
Monthly Deal
$49.01/mo
- In KRW
- ₩64,900
- Annual billing
- $41.29
- Included / month
- -
Official page lists 64,884 KRW. ₩64,883.8 per month. 10-day trial ₩1,324.2. Monitors 25 Facebook groups.
Yearly DealCheapest paid
$40.84annual billing only/mo
- In KRW
- ₩54,100
- Annual billing
- $40.84
- Included / month
- -
Official page lists 54,074 KRW. ₩648,838.5 billed once per year (monthly equivalent). 2 months free.
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.
Let Me Know When pricing
A website monitoring tool made by Let Me Know When. It checks your registered sites up to 6 times a day and sends the results by email or Slack. Tool page
| Plan | Monthly | Annual billing | KRW | Included / month | Notes |
|---|---|---|---|---|---|
| BasicCheapest paid | $3.99 | $3.33 | ₩5,300 | 600 credits | 10 websites, 600 checks per month, $39.99 billed annually as a single payment |
| Starter | $9.99 | $8.33 | ₩13,200 | 2,400 credits | 20 websites, 2,400 checks per month, $99.99 billed annually as a single payment |
| Advanced | $19.99 | $16.67 | ₩26,500 | 5,400 credits | 30 websites, 5,400 checks per month, $199.99 billed annually as a single payment |
BasicCheapest paid
$3.99/mo
- In KRW
- ₩5,300
- Annual billing
- $3.33
- Included / month
- 600 credits
10 websites, 600 checks per month, $39.99 billed annually as a single payment
Starter
$9.99/mo
- In KRW
- ₩13,200
- Annual billing
- $8.33
- Included / month
- 2,400 credits
20 websites, 2,400 checks per month, $99.99 billed annually as a single payment
Advanced
$19.99/mo
- In KRW
- ₩26,500
- Annual billing
- $16.67
- Included / month
- 5,400 credits
30 websites, 5,400 checks per month, $199.99 billed annually as a single payment
1 USD = 1,323.9 KRW (2026-10-27). Checked on the official pricing page on 2026-10-26. Bold values are monthly-billing prices; taxes and payment fees excluded.
FAQ
- Devi AI or Let Me Know When: which is cheaper?
- At just me usage, Devi AI (Yearly Deal, $40.84) is the only one with a public plan that covers it. At 3 people usage, Devi AI (Yearly Deal, $40.84) is the only one with a public plan that covers it. At 10 people usage, Devi AI (Yearly Deal, $40.84) is the only one with a public plan that covers it.
- Do Devi AI and Let Me Know When have free plans?
- Neither has a free plan.
- What are the entry prices of Devi AI and Let Me Know When?
- Entry prices: Devi AI Yearly Deal at $40.84/mo (about ₩54,100), Let Me Know When Basic at $3.99/mo (about ₩5,300).
How this is calculatedExchange rate, how a plan is chosen, what is excluded, and the disclaimer
How this is calculated
- 1KRW is converted at 1 USD = 1,323.9 KRW as at 2026-10-27. The rate is refreshed daily.
- 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.
- 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.
- 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.
- 5A 원고지 sheet is 200 characters; an A4 page is taken as 1,800 characters at 10pt with 160% line spacing.
- 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.
- 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.