Dev tools · alternatives · 2026

24 alternatives to Inday

Public holiday API for 100+ countries, built for developers

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.

1. 1
   DaysAround▲307

   Track every country you've ever been to. Privately.

   Jan 2026 · getflags.app · its alternatives →

2. 2
   Public Holiday app for Slack▲86

   Change user status during public holidays in their country

   2024 · its alternatives →

3. 3
   Slack Holiday Mode by Spoke.ai▲262

   Your AI assistant for your first day back

   2024 · its alternatives →

4. 4SM
   Stretch My Time Off – An Algorithm to Optimize Your Vacation Daysfree▲358

   Hey HN! I built StretchMyTimeOff as a quick experiment using Cursor (Anysphere's AI code editor) and GPT-4o to see how far AI could go in building a simple, functional site. What it does: The site helps you get the most out of your vacation by suggesting optimal days to take off around national holidays, maximizing long breaks with minimal vacation days, anywhere in the world and for any calendar year. It's an idea I've had for a while, and building the algorithm with GPT was a fun challenge. Any feedback or ideas I'm all ears :)

   2024 · stretchmytimeoff.com · its alternatives →

5. 5
   Foiz▲70

   Easily track your yearly holidays, to get the most of them

   2020 · its alternatives →

6. 6
   holidays.rest▲8

   A comprehensive and flexible public holidays API

   2024 · its alternatives →

7. 7
   24me Smart Personal Assistant▲114

   Keep new year's resolutions and get organized with 24me

   2022 · its alternatives →

8. 8
   VacayWiser▲216

   Find the best days for vacation

   2024 · its alternatives →

9. 9
   Mayday▲198

   The AI-assisted calendar that helps you make time to thrive.

   2023 · its alternatives →

10. 10
    Inseries 3▲92

    A smart, spreadsheet-like calculator app for iPhone & iPad

    2019 · its alternatives →

11. 11
    Yonks▲84

    Day counter app for iOS & Android.

    2019 · its alternatives →

12. 12CR
    Calenday, real-time collaborative calendars for trip planning▲207

    2022 · calenday.co · its alternatives →

13. 13
    Reminders API▲190

    A powerful reminder scheduling API

    2017 · its alternatives →

14. 14
    Piñata Birthday Reminder▲135

    Your simple source of truth for birthdays

    Sep 2025 · getpinata.app · its alternatives →

15. 15
    INDI App▲59

    Experience like a local

    2022 · its alternatives →

16. 16
    Deadlines▲105

    A calendar app for students and freelancers

    2019 · its alternatives →

17. 17
    WorkdaysCalculator.com▲2

    Free business days calculator for 50+ countries

    Jun 2026 · workdayscalculator.com · its alternatives →

18. 18
    Food Holidays▲94

    National days for foodies

    2024 · its alternatives →

19. 19
    Business Day Calculator▲4

    18 free deadline calculators, holidays in 25 countries

    Jul 2026 · businessdaycalculator.org · its alternatives →

20. 20
    GetNowDate simple API for date and time▲7

    Correct date and time handling, without the usual pain

    Dec 2025 · its alternatives →

21. 21
    Holiday Calendars▲2

    Public holidays worldwide by country and year

    Jun 2026 · holidaycalendars.org · its alternatives →

22. 22
    Ayer▲91

    Privately see any day of your photos across all your years

    Dec 2025 · chapiware.com · its alternatives →

23. 23
    Business Days Calculator▲5

    Free business days calculator - 166 countries, no signup

    Jul 2026 · calculatebusinessdays.com · its alternatives →

24. 24
    24me Smart Personal Assistant▲39

    Keep new year's resolutions and get organized

    2025 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →