Ionaut — Ham Radio

HF propagation & DX tools

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Ionaut is a free companion for radio amateurs — the whole shack in one app, with no account, no ads and no tracking. PROPAGATION & SPACE WEATHER - Real VOACAP forecasts, band by band and hour by hour, from your QTH to any continent or a specific callsign - Live space weather from NOAA (solar flux, K-index, solar wind, X-ray) - D-layer absorption (D-RAP), a live ionosonde (foF2/MUF, GIRO), history graphs and solar images (SDO/SOHO) DX & ACTIVITY - Live spots (PSK Reporter) and the worldwide DX cluster - Watcher: push alerts on a DX-cluster match - Callsign lookup — country, zone and callbook SKY - Satellite passes incl. QO-100 and GNSS - Moon / EME with azimuth, elevation and phase - Azimuthal map with the grey line and aurora; world sun times OPERATING - Band plans by country and licence class - Contest calendar (HF & VHF) - Nearby repeaters with map and compass — including the Gulf and Oman TOOLS - Antenna length, SWR, coax loss, dB/power, Ohm's law, Maidenhead locator and bearing LEARN (for newcomers) - Q-codes, phonetics, RST, modes, antennas, the ionosphere, cables & connectors and a D-Star unit - A CW (Morse) trainer using the Koch method with spaced repetition and progress tracking Available in 46 languages. No account, no ads, no tracking. Ionaut is and stays free. If you'd like to support the project: ko-fi.com/reinerklohn 73!

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Sporadic-E — new module Shows where Es clouds are standing right now. Three readings sit side by side and are deliberately not stirred into a single number, because they say different things: what was actually reported in the past hour, what the ionosondes measure, and what the season would lead you to expect. Real reports beat any calculation — the sonde only decides where nobody has been on the air. Reports on 2 m and 4 m only count as Sporadic-E if a 6 m cloud stands at the same place and time. An E layer that carries 144 MHz carries 50 MHz easily; the reverse does not follow. On 10 m the result is cross-checked against the F2 layer, so an F2 opening is not mistaken for Sporadic-E. Formula reference in the calculator The official German formula reference for the amateur radio examination, complete and properly typeset rather than photographed: fractions as fractions, roots with a radical bar, subscripts where they belong. From every section you jump straight into the matching calculator. Reproduced by permission of the Bundesnetzagentur. Widgets rebuilt Every view has been redesigned from scratch and now follows one shared layout. New: Sporadic-E with a radar view centred on your own location, and a DX view showing every world region at once, sorted by where you can reach right now. Space weather gives the space to the bands instead of two bare numbers, and Grayline draws a 24-hour day/night strip. Large widgets are supported for the first time. DX cluster with history The spot list used to reach back about twenty minutes. It now covers close to three hours. Licence classes The per-country notes have been reviewed and tidied, and the English texts are now complete rather than patchy. Albania had the wrong unit on 40 m (MHz instead of kHz) — corrected. Also - iPad: world map in the correct aspect ratio, time axis no longer wraps - Translations refreshed across all 44 languages - Many labels made consistent

The developer, Reiner Wilhelm Klohn, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
  • Reiner Wilhelm Klohn
Size
  • 167.8 MB
Category
  • Utilities
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Watch
    Requires watchOS 10.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
  • Generous tip ☕☕☕ $3.99
  • Nice tip ☕☕ $2.99
  • Small tip ☕ $0.99
Copyright
  • © 2026 Reiner Klohn