Comparison

K2Sonnet vs Kess

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

K2Sonnet

Features
Read full description

K2Sonnet, Your Next-Generation Smart Assistant.

About

Kess

Features
Read full description

Kess is a real assistant, not another chatbot. Ask out loud or type. She answers, then actually does the thing: calls it, books it, sends it, files it. WHAT KESS DOES - Makes real phone calls. The restaurant, the office, the shop, the plumber. She asks your question and brings back the answer. - Does things no app covers. Kess has her own computer: a web browser, files and small programs. Ask for something new and she works it out, then reports back. - Signs in to your own sites. Give her a login once and she keeps it encrypted, for you alone, and uses it only in her own browser. - Runs your calendar and reminders. "What's my day look like?" "Move my 2pm." "Remind me to send the offer by 5." - Sends your email and texts, written complete and ready. You see exactly what goes out and tap send. - Reads your mail. Gmail, Outlook and Microsoft 365. "Find the invoice from the plumber." - Starts your morning with a brief in her voice: your day, your reminders, the weather, what she is watching for you. - Orders your coffee and sets up rides, food, shopping and flights with your details filled in, one tap from done. - Makes real files: a budget, a deck, a document, a PDF, built and handed to you as a link. - Reads what you send her: photos, PDFs, spreadsheets and documents, right in the chat. - Talks hands free. Tap the mic once and have a conversation. In the car, she tells you what needs you. - Remembers you. Your people, your places, your usual order, and everything you told her today. FOR REALTORS - Showing feedback, done. After each showing she calls the other agent, asks the four questions, and writes it up for your seller. - Weekly seller updates every Monday, with showings, feedback and views, in a report with your name on it. - Online leads called within minutes, as your assistant, qualified and logged in your CRM. - "File this in Transaction Desk." She signs in through WEBForms, puts the document on the right checklist line and saves it the way the office needs. - Contracts filed: upload the deal and the price, deposit, conditions and closing date land in your CRM and calendar. - Rowan, your coach: a daily check-in, a Sunday call and your real numbers against your goal. Sold on top of any plan. PLANS Kess is free to try. Kess Pro, for one person, is CA$19.99 a month or CA$129.99 a year. Kess Pro Together covers up to five phones, your family or your team, for CA$29.99 a month or CA$199.99 a year. Kess Realtor, with the realtor tools and more minutes, is CA$99.99 a month. Top-up packs add messages, spoken replies, call minutes and feedback showings when you need more. Cancel any time in your iPhone settings. PRIVATE BY DESIGN No account to create. Your calendar, contacts and reminders stay on your phone; Kess asks permission the first time she touches each one. Nothing is sent, posted, booked or paid without your tap. MADE BY ONE PERSON IN CANADA Kess is built and run by one person, a working realtor, in Canada. She grows new abilities every week, partly from what users ask for. Ask her for something she can't do yet and she takes it to the build room; you hear from her when it ships. Go live your life. Kess will take care of the rest.

Screenshots

K2Sonnet4 screens
Kess4 screens

Verdict

The call

The clearest difference is in-app purchases: K2Sonnet at none against Kess's 12. K2Sonnet also leads on iOS requirement (17.6 vs 26.0). Kess's advantage is update cadence (every 4 days vs every 7 months). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kess sells 12 in-app purchases, starting at $14.99 per month. K2Sonnet asks for nothing beyond the download.

UpkeepUpdate frequency

K2Sonnet ships an update every 7 months, Kess every 4 days. Both last shipped on October 24, 2026.

Scorecard3 real differences · 5 level
K2Sonnet versus Kess: the parameters behind the verdict, then further details
ParameterK2SonnetKess
PriceFreeFree
Rating1.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 7 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.6 — better26.0
Further details — not scored
Size2 MB14 MB
Age rating17+4+
DeveloperShanghai Jiyue Information Technology Co., Ltd.Kessway Technologies Inc.

In-app purchases

None

K2Sonnet

No in-app purchases

12 purchases

Kess

Subscriptions8
  • Kess Pro Monthly14 Days trial$14.991 Month
  • Kess Pro Monthly7 Days trial$14.991 Month
  • Kess Pro Together Monthly14 Days trial$22.991 Month
Show 5 more
  • Kess Realtor14 Days trial$69.991 Month
  • Kess Pro Yearly14 Days trial$99.991 Year
  • Kess Pro Yearly7 Days trial$99.991 Year
  • Kess Pro Together Yearly14 Days trial$149.991 Year
  • Rowan, your coach$219.991 Month
One-time4
  • 100 more spoken replies$5.99
  • 200 more messages$6.99
  • 30 more call minutes$9.99
Show 1 more
  • Feedback on 10 more showings$9.99

Questions

Is K2Sonnet free?
K2Sonnet is free to download, with no in-app purchases.
Is Kess free?
Kess is free to download, with in-app purchases available.
Do K2Sonnet or Kess have ads?
Neither K2Sonnet nor Kess shows ads.
Which is updated more often, K2Sonnet or Kess?
K2Sonnet ships an update every 7 months, and Kess every 4 days. Most recently, K2Sonnet was updated on October 24, 2026 and Kess on October 24, 2026.

Other comparisons