Ham Solar | HAP Chart

by Muhammad Zakwan · Tools · Free

On Google Play since April 2017 · Data updated 2026-10-10

Google Play

Ham Solar | HAP Chart is made and published by Muhammad Zakwan. AppBrain is an independent app data site and isn't affiliated with Muhammad Zakwan. The app name, icon, screenshots and description belong to Muhammad Zakwan and are shown as published on Google Play.

AppBrain's verdict

EstablishedWell rated

Rating on Google Play: 4.43; 1,517 ratings
Installs: 53 thousand
Last updated: July 23, 2024
Ads: No ads
Size: 4.36 MB

Ham Solar | HAP Chart has 53 thousand installs. Users rate it well: 4.4 stars from 1,517 ratings.

Summary

Ham Solar | HAP Chart provides map-based MUF visualizations for HF propagation planning using current ionospheric data. Built with MIT App Inventor 2, it visualizes Hourly Area Prediction charts to help assess reach to distant locations (e.g., Minneapolis).

Pros & Cons

Specialized HF MUF visualization tailored for propagation planning
Map-based MUF insights enable quick cross-location assessment
Relies on current ionospheric data for timely predictions
MIT App Inventor 2-based design supports easy customization

Lacks weather, alerts, or forecast features common to competitors
HAP charts are valid only for the current hour, not a forecast
Requires internet connection to fetch data

User feedback

Ratings and reviews on Google Play

Comments on Ham Solar | HAP Chart for Android

★★★★☆ Mike Naylor · Jan 30, 2021

I use it at least once a day to check band openings, I wish I knew more about the other numbers though.

★★★★★ David Dietrich · Dec 16, 2020

A "must have" for hams! It's a no frills' app, just straightforward information you need to know about solar conditions. The same graphic is available online at various sights, but having the app is so much easier. I use it to determine whether I am going to jump on the radio and operate, or if it is better to go do something else as my free time is limited.

★★★★★ C. Matthew Whalen · Apr 7, 2021

Simple app that displays the propagation chart. Does exactly what I need it to do.

★★★★★ Indrid Cold · Jul 5, 2021

This is a wonderful app to know when shortwave propagation is high, so I can listen to Nagoya, Japan from Saskatchewan, Canada. I can also listen to over the horizon radar, the ever dwindling amateur radio operators, ships at sea, and military shortwave operations. This is the most concise app for the size.

★☆☆☆☆ Stephen Sutker · May 17, 2022

Thank you for your quick response to my post. I truly appreciate your time and interest. To detail my issues; I have had your HAM SOLAR app for quite a while and really like it. Recently the app just stopped working. By stopped working I mean it would not load beyond the initial splash screen showing two globes, the refresh and donate buttons. After rebooting my phone several times with no joy, I deleted the app and reinstalled it with the same results. I also tried to reconnect from a different location on the other side of town with the same (or lack of) results. Additionally, While reloading the HAM SOLAR app, I saw another of your apps, HAM CONTEST, which I thought was a great idea. I downloaded the app and found the exact same issues noted above. As you might imagine, this has been very frustrating when I also have the HF PROPAGATION app loaded on my phone, and it is, and has been working FLAWLESSLY for months. Thanks again for your time and the quick response '73 Steve Sutker K4LEG

Google Play Rating history and histogram

970

390

Store listing

By Muhammad Zakwan, from Google Play

“Tool to show current HF propagation prediction.”

Screenshots by Muhammad Zakwan, from the Google Play listing

Description by Muhammad Zakwan Written by the developer, not by AppBrain. Click to read.

[INTRO]

Ham Solar is using code from Paul, N0NBH website. Its requires internet connection.

[HAP CHART]

Hourly Area Prediction (HAP) chart feature is also provided by this app. Its specifies the Maximum Usable Frequency (MUF) for HF communications between the base specified and any location on the map. The colors represent the MUF for communications between that location on the map and the base selected.

Thus, if communications are required to or from Minneapolis, a HAP chart for Minneapolis should be used. The other end of the circuit is then found on the HAP chart and the color at that location gives the MUF for that circuit.

HAP charts are charts based on current ionospheric conditions observed with ionosondes in the region of interest. This chart is only valid for the current hour due to the highly variable nature of the ionosphere.

It is also helpful to view HAP chart propagation from the perspective of distant locations. In this manner you can determine if they are able to reach the Midwest with a usable MUF.

If you love this app, please kindly to rate it and give donation to Paul. Just inform me via email if you find any problems.This app is fully designed by using MIT App Inventor 2.

Regards, 9W2ZOW.

Recent changes:
v2.4.6 (23 July 2024)
- Fix list code.
- Update font typeface.
- Update new app icon.
- Update target API level requirement.

v2.4.5 (14 November 2023)
- Add follow url to Australian Space Weather Services.
- Add follow url to HrdLog.
- Add follow url to QRZ callsign database.
- Fix HF band condition code.
- Fix HAP chart map code.
- Fix HrdLog QSO map code.
- Fix QRX cluster code.
- Fix setting code.
- Remove clock component.

*** Visit Url zmd94.com/solar to see full changelog.

Official page on Google Play

Safety and technology

Found in the app by AppBrain

Ads: No ads
Price: Free
Libraries: 18
App size: 4.36 MB
Needs Android: 2.1+
Content rating: Everyone

Technologies used by Ham Solar | HAP Chart

2 permissions · 18 libraries

Subscribe to see full permission and library details

Trust & Safety: Uses only network permissions (ACCESS_NETWORK_STATE, INTERNET); no location or other sensitive permissions are requested. Data access is limited to online propagation data and updates.

Releases

Updates seen on Google Play

Version: 2.4.6
Launched: April 2017

Apr 7, 2026Installs50,000+ installs
Jul 23, 2024UpdateVersion 2.4.6
Nov 14, 2023UpdateVersion 2.4.5
Jul 22, 2021UpdateVersion 2.4.4
Sep 11, 2020UpdateVersion 2.4.2

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Alternatives

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Installs

Tracked by AppBrain

Last 30 days: 120
Play install range: 50+ thousand
Launched: April 2017

Installs over time

Ham Solar | HAP Chart has been installed 53 thousand times. Over the past 30 days, it has been installed 120 times.

Rankings

Google Play top charts

Google Play Rankings for Ham Solar | HAP Chart

This app is not ranked

About the app and developer

About Ham Solar | HAP Chart

Ham Solar | HAP Chart is a tools app developed by Muhammad Zakwan.

Install Statistics

Ham Solar | HAP Chart has been installed 53 thousand times. In the last 30 days, the app was installed 120 times.

User Ratings

Ham Solar | HAP Chart is rated 4.43 out of 5 stars. The rating is based on 1.5 thousand ratings.

App Information

Ham Solar | HAP Chart is freely available from Google Play. The app size is 4.36 MB. The latest version available is 2.4.6. The last update was on July 23, 2024.

Technical Requirements

Ham Solar | HAP Chart requires Android 2.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since April 2017.

App Performance Report

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Developer information for Muhammad Zakwan

Muhammad Zakwan

my9m@pm.me

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Frequently asked questions about Ham Solar | HAP Chart

Is Ham Solar | HAP Chart free?

Yes. Ham Solar | HAP Chart is free on Google Play.

Is Ham Solar | HAP Chart still available?

Yes. Ham Solar | HAP Chart is on Google Play, and the last update we saw was on July 23, 2024.

Does Ham Solar | HAP Chart contain ads?

No. Google Play does not list Ham Solar | HAP Chart as containing ads.

What Android version does Ham Solar | HAP Chart require?

Ham Solar | HAP Chart runs on Android 2.1 and higher.

How large is Ham Solar | HAP Chart?

Ham Solar | HAP Chart is 4.36 MB.

Is Ham Solar | HAP Chart suitable for children?

Google Play rates the content of Ham Solar | HAP Chart as suitable for everyone.

How many times has Ham Solar | HAP Chart been installed?

Google Play lists 50,000+ installs for Ham Solar | HAP Chart.

How do people rate Ham Solar | HAP Chart?

Ham Solar | HAP Chart scores 4.43 out of 5 stars, from 1,517 ratings on Google Play.

Who made Ham Solar | HAP Chart?

Ham Solar | HAP Chart was developed by Muhammad Zakwan. It is listed in the tools category on Google Play.

What are the best alternatives to Ham Solar | HAP Chart?

People looking at Ham Solar | HAP Chart also look at these tools apps: Ham Radio Toolbox, Approach Charts, Ham Radio US Band Plan, SkyCharts XC EFB geo-reference, PWS Meteo Monitor PRO.

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