# I have a problem with Web API

**URL:** <https://community.thunkable.com/t/i-have-a-problem-with-web-api/784273>\
**Category:** Questions about Thunkable X\
**Tags:** beginner\
**Created:** [September 1, 2020, 8:08am UTC](https://community.thunkable.com/t/i-have-a-problem-with-web-api/784273 "2020-09-01T08:08:37Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\
**Post date:** [April 27, 2021, 5:23pm UTC](https://community.thunkable.com/t/i-have-a-problem-with-web-api/784273/9 "2021-04-27T17:23:33Z")

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This problem is individual to certain APIs. I don’t believe you’re going to be able to force an API that doesn’t work as a web app to work. I don’t understand the technical reasons for this but I’ve come to accept it.

What I did for measuring distances is to use the Haversine formula and create the math for it in Thunkable. It takes a ton of blocks to do but it works really fast and really well.

> [@Calculate distance travelled](https://community.thunkable.com/t/calculate-distance-travelled/565278):
>
> hello, its me again. how does one calculate distance travelled over time on a map in thunkable x? I intend on generating a notification if a certain distance is covered within x amount of time

Tatian

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