Comparison

Serendipity Labs vs Duckbill

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

Head to head
About

Serendipity Labs

Features
Read full description

Serendipity Labs members are invited to use this app to book a variety of workspaces at any location. Quickly and easily reserve private day offices, open work stations, coworking, meeting and conference rooms on demand. Independent professionals and remote employees alike choose Serendipity Labs for its flexible workspaces, inspiring design, corporate service standards, safety protocol and unmatched hospitality. Not a member but want access to premium on-demand flexible workspace near you? Visit Serendipitylabs.com/worktopia to create a no-obligation membership and learn more about the features and benefits of a fully optimized work environment.

About

Duckbill

This app offers human-led, AI-enhanced personal assistance for everyday tasks and life administration. It handles everything from prescription refills and appointment booking to travel arrangements and bill management, freeing up your time.

Highlights
  • Human-led AI-enhanced assistance
  • Task execution for daily chores
  • Life administration management
  • Prescription refill coordination
  • Birthday card and gift sending
  • Passport renewal services
  • Travel booking and coordination
  • Grocery delivery setup
Features
Read full description

Duckbill is an executive assistant for your personal life, led by expert humans and enhanced with AI superpowers. We provide life support by taking over the execution of dreaded everyday tasks and endless life admin. Just tell us what you need, like: - I’m having trouble finding my Rx in stock anywhere, can you call around to pharmacies and have it delivered monthly? - Can you put my friends and family's birthdays on my calendar, and send each one a handwritten card from me every year? - Renew my passport, please. - Can you review my calendar and book me a trip to/from the airport for each flight? - Send me new recipes each week and set up an ongoing grocery delivery so I have what I need for each one. - Can you call my health insurance and sort out this medical bill? I don’t have time to wait on hold. Then, our team of copilots will get to work! We’ll ask the right questions to get it done. We promise: we’re always aiming to take the burden off of you. With just a bit of info from you, we’ll start to anticipate your to-do’s and stay one step ahead. The more we get to know you, the better Duckbill gets. It feels good to let go, doesn’t it?

Screenshots

Serendipity Labs4 screens
Duckbill4 screens

Verdict

The call

The clearest difference is update cadence: Duckbill at weekly against Serendipity Labs's every 3 months. Duckbill also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Serendipity Labs ships an update every 3 months, Duckbill weekly. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
Serendipity Labs versus Duckbill: the parameters behind the verdict, then further details
ParameterSerendipity LabsDuckbill
PriceFreeFree
Rating—4.3 (70 ratings) — better
Positive reviews—74.4% of reviews
Number of ratings—70 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size27 MB116 MB
Age rating4+4+
DeveloperSerendipity Labs, Inc.Duckbill Technologies, Inc.

Bugs and requests

Serendipity Labs

Not enough reviews yet to summarise bugs or requests.

Duckbill

Reported bugs

5 issues
  • No way to resolve billing issues on mobile
  • Service went down due to billing issue with no quick fix
  • Login screen freezes (inferred from billing issue)
  • Incompatible with older devices (inferred from general app issues)
  • Home screen features gone

Requested features

8 requests
  • Ensure tasks are completed within scope
  • Humans can't get paid until task is marked complete by user with 5 stars
  • Flat, predictable pricing plan instead of credits
  • Bring back unique and useful app features
  • Automate more features with agents
Show 3 more
  • Build multi-action agents (shopping, calendar management, bookings)
  • Lower prices
  • Improve app cleanups (e.g., password prompts)

In-app purchases

None

Serendipity Labs

No in-app purchases

None

Duckbill

No in-app purchases

Questions

Is Serendipity Labs free?
Serendipity Labs is free to download, with no in-app purchases.
Is Duckbill free?
Duckbill is free to download, with no in-app purchases.
Do Serendipity Labs or Duckbill have ads?
Neither Serendipity Labs nor Duckbill shows ads.
Which is updated more often, Serendipity Labs or Duckbill?
Serendipity Labs ships an update every 3 months, and Duckbill weekly. Most recently, Serendipity Labs was updated on November 7, 2026 and Duckbill on November 3, 2026.

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