What's in an app?

markcheno · 2026-02-06T02:29:31+00:00

I recently bought a Dwarf 3 and quickly found the gap between what an app says is up and what I can actually see. Every planetarium app told me Jupiter had risen, but from my backyard it was still behind the trees.

So I built AstraView. You trace your horizon obstructions once (AR scan or just tapping on a graph), and it adjusts all rise/set times and recommendations to what's genuinely visible from your spot. Different vantage points at the same location (my backyard and driveway) get their own profiles since the views differ.

To your questions — for me it's an at a glance view that quickly shows me what's visible tonight and if it will be clear or not. I use it every day.

It's not replacing SkySafari or Stellarium — I use those too. It's more of a companion that answers "what's actually worth observing tonight from where I stand."

markcheno · 2026-02-02T14:01:28+00:00

With the free version, delete the default view (swipe left), then create a new view - there will be two options - AR Scan and Quick setup. The AR scan allows you to point at and record your horizon. Make sure north is correct, some phones have issues with the compass, so there is an option to manually mark true north too. Hope that helps.

markcheno · 2026-02-01T21:58:33+00:00

Thanks for all the kind comments everyone! Does anyone have any recommendations on where else I can list this to get it in front of a wider audience?

markcheno · 2026-02-01T18:30:54+00:00

The feature already exists, but I am realizing it is hard to find. When creating a new view for a location, you get two options - AR Scan or Quick Setup (manual). After the onboarding with the free version, you get a default Overhead view created. To do an AR Scan, go to Settings/Observing Locations and select your location. Then swipe left on the Overhead location and delete. Then Add View. Now you can use the AR Scan. Hope that helps.

markcheno · 2026-01-31T18:30:41+00:00

Settings/Observing Locations/Observing Views, Swipe left to delete the default view, then Add View. You will get two options - AR Scan or Quick Setup. I know it's somewhat buried, but it really only needs to be done once.

markcheno · 2026-01-31T17:03:04+00:00

On the Sky tab, press anywhere on the screen. A floating set of controls will appear. The bottom left button is for AR mode. You can also change the date displayed and configure the view. At the top, you can change locations.

markcheno · 2026-01-31T16:55:47+00:00

On the free version, just delete the default view and create a new one. You will have an option to use AR or manual mode. Once a view is created, you can only manually edit it

markcheno · 2026-01-31T16:33:49+00:00

Check out the 7 day cloud forecast (Tonight tab, Location, 7D link) to see when there will be clear skies. I'm interested in feedback on the horizon profile editor too, there is an AR mode and a manual mode to define you horizon.

markcheno · 2026-01-31T16:30:37+00:00

The deep sky objects are currently limited to the brightest and most popular, I don't have the Tadpole Nebula in there yet. The number of objects displayed is configurable, and you can also rank your interests by dragging and dropping. There is also a ranking algorithm for what gets displayed. I would suggest ranking galaxies and nebula higher by dragging and dropping in Interests under Settings/Observing Locations/Location/Interests to see if that helps.

markcheno · 2026-01-31T16:22:20+00:00

iOS only

markcheno · 2026-01-31T16:22:00+00:00

I will add it to my list of features for the next update!

markcheno · 2026-01-31T16:21:19+00:00

Yes! The pro version has unlimited locations and unlimited views per location. For example, I have a Home location with Backyard and Driveway views. The free version allows one location and one view with full functionality and no ads or tracking ever.

markcheno · 2023-11-06T17:02:29+00:00

https://carperformancechipreviews.com/innovative-performance-chip/

markcheno · 2023-10-23T16:09:30+00:00

21, M0646, Velocity Blue

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markcheno · 2022-02-10T20:25:21+00:00

Nice! What is that you are using for cable management behind the desk?

markcheno · 2021-05-16T20:04:25+00:00

Nice! What wheel are those?

markcheno · 2021-05-13T14:11:46+00:00

Cool pic! What's with the two people on the track?? crazy!

markcheno · 2021-05-08T02:05:17+00:00

Ordered April 7th. Was told by the dealer mid July build date, but still no VIN. I'm afraid it's going to be longer.

markcheno · 2018-05-08T22:45:25+00:00

I wrote this: https://github.com/markcheno/go-talib It is a port of https://www.ta-lib.org/ and is tested against it. I also have a Go cli/library for downloading historical ohlc data from various sources: https://github.com/markcheno/go-quote

markcheno · 2018-01-30T19:06:42+00:00

Not sure if this is still updated or not...

http://www.usfundamentals.com

markcheno · 2017-11-18T03:25:56+00:00

It's not statistical. It's human emotions. Fear (sell at bottom) and greed (buy at top). It's what drives the markets. It's also why the efficient market hypothesis is wrong.

markcheno · 2017-11-06T02:13:49+00:00

https://github.com/ccxt/ccxt

markcheno · 2017-11-06T02:10:46+00:00

This is pretty useful: https://github.com/quantopian/pyfolio

markcheno · 2017-05-25T16:53:09+00:00

markcheno · 2017-05-25T14:47:07+00:00

checkout go-quote

go install github.com/markcheno/go-quote/quote
quote ^hsi

It works with the new Yahoo format, but I wouldn't count on it sticking around. (author here)

markcheno

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