Ham Radio · GMRS · Field Operations

Know before
you key up.

The path planning app built for ham radio operators and GMRS users. Drop two pins, check the terrain — get a clear answer before you ever transmit.

Ham Radio GMRS FCC License Prep HF Propagation POTA / SOTA Emergency Comms
Coming to Google Play See what's inside

Free download · No account · Works offline after first load · Android first

Ground Path · Result
● LIKELY
FRESNEL A B 18.4 mi RADIO Ham 2m · 50W · 5/8λ vertical · Suburban HEIGHT 30 ft above ground DIST 18.4 mi BRG 247° PATH LOSS ~108 dB — within link budget
6 Core tools
1,000+ Exam questions
4 Antenna builds
100% Works offline

What's inside

Built for ham radio.
Works for everyone.

Six purpose-built tools for amateur radio and GMRS operators. No account required. Works offline after first load.

Ground Path

Terrain & signal analysis

For ham and GMRS operators. Drop two pins, get terrain, Fresnel zone, and Earth curvature in seconds — Likely, Possible, or Unlikely.

HF Skywave · Pro

Long-range propagation

Plan HF DX contacts on 10m–80m. See your skip zone, MUF, K-index, and the best band and UTC window for your path.

Repeaters

Find repeaters near you

Browse, filter, and save repeaters. View any on the map. Import from RepeaterBook or add your own.

License Trainer

Pass your exam

Full FCC amateur radio question pools — Technician free, General and Extra with Pro. Spaced drills, instant explanations, progress tracking.

Antenna Builds · Pro

Build your own antenna

Four illustrated DIY guides with exact cut lengths and step-by-step instructions written for beginners.

Radio Language

Sound like a pro

NATO phonetics, Q-codes, and on-air scripts. Interactive drills so your first transmission is confident.

Ground Path

The answer before
you key up.

Built for ham radio and GMRS operators planning POTA activations, emergency nets, or any path you're not sure about. Real terrain, Fresnel zones, Earth curvature — all on your phone, no data connection needed.

● Likely
● Possible
● Unlikely
Configure your radio first. Pick your service (GMRS, Ham 2m, HF, etc.), antenna type, height above ground, and output power. Takes 30 seconds.
Drop two pins. Place Radio A at your location and Radio B at your destination. The analysis runs the moment you tap "Use This Path."
See the terrain profile. Not just a number — a visual cross-section of the path with hills, ridges, and the Fresnel zone drawn in.
Understand why. Every result explains the path loss, what's blocking signal if any, and what would improve it — more height, different location, or a repeater.
● LIKELY 9:41 AM GROUND PATH Ham 2m · 50W · 5/8λ vertical RESULT Likely Path loss ~108 dB · within link budget DIST 18.4 miles TERRAIN PROFILE FRESNEL A B HEIGHT 30 ft BEARING 247° CONTEXT Suburban ↺ Re-run with current settings Reset Reach Repeaters Train Tools

HF Skywave · Pro

Plan your skip.
Know your window.

Ham radio DX doesn't happen by accident. CanIReach models the ionospheric path for any 10m–80m contact — skip zone, MUF, best band, K-index — so you know before you call CQ.

Skip zone estimate. See the dead zone between you and where your signal will first hit Earth — with a visual arc drawn on the result.
MUF guidance. Maximum Usable Frequency calculated for your path, so you know which bands to avoid and which to favor.
Band and time recommendations. See which HF bands are most favorable for your path right now — 10m, 15m, 20m, 40m, 80m — and when propagation opens and closes.
Space weather context. K-index and solar flux displayed so you know if propagation is disturbed before wasting time calling CQ.
HF SKYWAVE · PRO 14.225 MHz · 100W · Dipole SSB · 20m band F2 LAYER — ~300 km — Earth surface — TX RX 3 × F2 skip · ~5,500 mi total 10m 15m 20m ✓ 40m 80m MUF 21.4 MHz SKIP DIST ~1,850 miles K-INDEX 2 Quiet 20m is favorable right now Good skip to Europe and South America · Peak 14–18 UTC Reach Repeaters Train Tools

Repeaters

The nearest link
in the chain.

When direct contact is marginal or unlikely, a repeater changes everything. Browse, filter, save, and map repeaters wherever you are.

Filter by band, tone, and distance. See only what's relevant — 2m, 70cm, or GMRS. Filter by CTCSS/DCS tone, callsign, or operating status.
Import from RepeaterBook. Download a GPX file from RepeaterBook.com and import it into CanIReach with one tap. Your data, stays on your device.
Add your own. Manually add club repeaters, emergency nets, or personal favorites. Everything is stored locally.
View on the map. See any repeater's estimated location on the terrain map and run a Ground Path analysis directly to it.
REPEATERS Find repeaters nearby Search callsign, frequency, location… All 2m 70cm GMRS W6XYZ · 146.940 MHz – 0.6 MHz offset · PL 100.0 Hz · 2m ● Online · 3.2 miles ★ N6ABC · 147.195 MHz + 0.6 MHz offset · PL 94.8 Hz · 2m ● Online · 7.8 miles ☆ KD6ZZZ · 443.200 MHz + 5 MHz offset · PL 127.3 Hz · 70cm ● Online · 11.2 miles ☆ WØXYZ · 462.675 MHz GMRS · CTCSS 141.3 Hz ● Online · 14.6 miles ☆ K6QRS · 147.045 MHz + 0.6 MHz offset · No tone · 2m ◌ Status unknown · 18.3 miles ☆ Reach Repeaters Train Tools

License Trainer

Study smarter.
Pass faster.

The complete FCC Amateur Radio question pool — all three license classes. Spaced drills, instant explanations, and session-by-session progress tracking. No flashcard apps, no extra steps.

Three license paths. Technician (free), General and Extra (Pro). Each pool is the current FCC-released question set.
Track your weak spots. CanIReach logs which questions you got wrong and surfaces them more often in drills. Your weakest section rises to the top.
Instant explanations. Every question has a plain-English explanation — not just the correct letter, but why it's correct and what rule or concept it tests.
Simulated exams. Run a timed 35-question exam simulation and see your pass/fail score before you walk into the testing session.
LICENSE TRAINER · TECHNICIAN TECH GENERAL $ EXTRA $ 41% · 148 of 360 seen Accuracy 88% T1A05 · RULES & REGS Which of the following is a purpose of the Amateur Radio Service as defined by the FCC Rules? Question 5 of 35 A Advancing skills in the technical and communication phases of the art ✓ B Earning income from radio operation in emergency situations C Broadcasting news and information to the general public D Training operators for commercial broadcast stations Why A is correct 47 CFR §97.1 lists five purposes of the Amateur Radio Service. Advancing skills in technical arts is one of them. Reach Repeaters Train Tools

Antenna Builds · Pro

Build the antenna.
Own the range.

Four field-proven DIY antenna designs — illustrated step-by-step, with exact cut lengths and a plain-English parts list. No soldering experience needed for three of the four builds.

3 illustrations per build. Parts layout, assembly detail, and finished antenna — so you always know what "done" looks like.
Exact cut lengths. Calculated for each band. No formula hunting, no unit conversion.
Field tips and safety notes. What to do after you build it — how to tune, what to watch for, how to check SWR.
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λ/4

2m / GMRS

¼-Wave Ground Plane

Beginner · Free

0 dBd gain
⁵⁄₈λ ¼λ feed

2m Band

Slim Jim

Beginner · Pro

+3 dBd gain
REF DRIVEN DIR beam direction →

2m Band

3-Element Yagi

Intermediate · Pro

+7 dBd gain
⁵⁄₈λ ¼λ 462 MHz cut

GMRS · 462 MHz

GMRS Slim Jim

Beginner · Pro

+3 dBd gain

Radio Language

Sound like a pro
from day one.

Most new operators know the theory but freeze on air. CanIReach gets you through one real first contact for free — the phonetic alphabet, ham slang, and signal reports — then goes deeper with Pro: Q-codes, on-air scripts, an AI QSO coach, and voice practice.

NATO phonetic alphabet. Drill all 26 letters with interactive flashcards. Hear how real operators use them in standard callsign exchanges.
Ham slang & signal reports. CQ, DX, ragchew, 59, 58, 57 — the everyday vocabulary of a real QSO.
First Contact simulator & checklist. Walk through a full QSO before you ever key up, free.
Q-codes & on-air scripts. QSY, QRM, QRZ, QTH and dozens more, plus real CQ calls, contest exchanges, and emergency activations written out word for word. (Pro)
AI QSO coach & voice practice. Simulate a contact and rehearse your callsign out loud with speech recognition. (Pro)
RADIO LANGUAGE NATO Phonetic Alphabet A Alpha B Bravo C Charlie D Delta E Echo ← now F Foxtrot G Golf H Hotel I India Q-CODES · PRO Unlock → QSY Change frequency 🔒 Pro QRM Interference present 🔒 Pro ON-AIR SCRIPT · CQ Call · 🔒 Pro "CQ CQ CQ, this is…" "[your call], [your call]" "calling CQ and standing by for any station." Unlock scripts with Pro → Reach Repeaters Train Tools

Pricing

Start free.
Go Pro when you're ready.

No sign-in. No tracking. Core features free forever. Pro is a one-time purchase — yours to keep.

Free

$0

Always. No card.

  • Ground Path — unlimited
  • Repeater finder (2 saves)
  • License Trainer — Technician
  • Radio Language — phonetics, slang & first contact
  • Ground Plane antenna guide
  • Grid Locator
🎉 Launch Offer First 500 buyers only

CanIReach Pro

$4.99

$9.99

One-time · yours to keep · price rises after first 500 sales

  • Everything in Free
  • HF Skywave planner
  • License Trainer — General + Extra
  • All 4 antenna build guides
  • Unlimited saves
  • Radio Language — Q-codes, scripts, AI coach & drills
  • Operator Profile

Available on Google Play · Android first · iOS planned

Get CanIReach

Know what you can reach.
Before you key up.

Free download. No account. Works offline. Coming to Google Play — follow for updates.

Coming to Google Play

Android first · iOS planned · Free base tier · Pro $4.99 launch price (first 500 buyers)