# Ham Engineering > The offline RF engineering bench for amateur radio operators. Canonical page: [https://chrome-stats.com/d/com.unixeer.hamengineering](https://chrome-stats.com/d/com.unixeer.hamengineering) ## Overview - **ID:** `com.unixeer.hamengineering` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Unixeer - **Category:** TOOLS - **Downloads:** 41 - **Version:** 1.1.0 - **Last updated:** 2026-08-26 - **First published:** 2026-08-12 - **Publisher country:** OM - **Size:** 27 MB - **Data as of:** 2026-09-12 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.unixeer.hamengineering) - **Website:** [https://www.unixeer.com/](https://www.unixeer.com/) - **Privacy policy:** [https://www.unixeer.com/ham\_engineering/privacy-policy.html](https://www.unixeer.com/ham_engineering/privacy-policy.html) ## Description Ham Engineering is the engineering bench for amateur radio — antenna and feedline maths, circuit design, propagation and a deep reference library, all completely offline. No account, no ads, no tracking, and not a single network call.

ANTENNAS
• Half-wave dipole with adjustable k (velocity) factor, quarter-wave and 5/8-wave verticals, ground-plane radials, end-fed half-wave, random wire, full-wave loop and a 3-element Yagi estimator
• Matching: L-network, Pi-network, quarter-wave transformer, balun/unun ratios and stub matching
• Antenna Lab — a live elevation radiation-pattern plot with directivity, realized gain, takeoff angle, beamwidth, front-to-back, mismatch loss, feedline loss and system gain, each explained
• Grid Compass that rotates with your phone, showing beam bearing and distance from your grid to a target grid
• Antenna gallery — every common type drawn as scalable vector art, with what it is, what it is for and what to watch out for

FEEDLINES & RF
• Coax loss by cable type, frequency and run length; velocity-factor electrical length
• SWR from forward/reflected power, plus return loss and mismatch loss
• Antenna A/B comparison and receiver noise-floor estimation
• RF power conversions: dBm, watts, ERP and EIRP
• Propagation: free-space path loss, radio horizon and Fresnel-zone clearance
• NanoVNA and tinySA quick-start guides, and a coax + connector gallery

CIRCUITS
• Ohm's law, series/parallel resistance, voltage dividers, RC and RL time constants
• Reactance, LC resonance, Q and bandwidth, stored energy
• RC and LC filter cutoffs, a constant-k Pi/T filter designer, a bandpass/notch calculator and a Butterworth low-pass designer
• Resistor, capacitor and inductor code decoders, an AWG wire table and a 555 timer calculator
• A live RLC resonance lab and a 50-part component gallery

REFERENCE & EXTRA
• Filterable amateur band plan for ITU Regions 1, 2 and 3
• Unit converters including watts, dBm and microvolts
• Comparison tables for coax, connectors, antennas and batteries
• Tools-and-gear and rig-controls galleries — what every knob and button is called across manufacturers
• Maidenhead grid tools and great-circle beam headings
• 300+ searchable tips, 40+ formulas, a rich glossary and a constants reference
• Curated external links to major retailers, brands and references

BUILT FOR THE BENCH
• Nearly 200 illustrations drawn as scalable vector art — nothing to download, everything sharp at any size
• Works fully offline. The app makes no network calls at all
• Export any panel or diagram as a theme-aware image to share or file
• An (i) explanation on every panel — this is a tool and a guide, not a quiz
• Light and dark themes, adjustable font size, weekly tips and in-app version history
• Your callsign, grid and email stay on your device and are never transmitted

PERFECT FOR
• Licensed operators designing, building and tuning antennas
• Anyone putting up a first dipole or vertical and wanting the numbers right
• Homebrewers and kit builders working with filters, matching and components
• SWLs and newcomers who want the reference material without the exam drill
• Club elmers and anyone teaching antenna and RF fundamentals

PRIVACY
• Your callsign, grid and email are stored only on your device.
• No account, no sign-up, no ads, no analytics SDKs, no advertising ID and no tracking of any kind.

73 de A41UX
Yousuf AL Balushi — Unixeer, Oman ## Rankings - #2,329,723 — Overall ## Permissions and access ### Permissions - `com.android.vending.CHECK_LICENSE` - `com.unixeer.hamengineering.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [AMRT — Ham Radio Toolkit](https://chrome-stats.com/d/com.appricode.amrt) — 196 users - [RF Antenna Designer](https://chrome-stats.com/d/com.alldigital.antennadesigner) — 2,954 users - [AntWave: Antenna & RF Toolkit](https://chrome-stats.com/d/com.rfmicrowavelab.antwave) — 79 users - [Ham and More, amateur radio](https://chrome-stats.com/d/net.hamandmore.ham) — 21,361 users, 4.37 / 5 - [RF Calculator Pro](https://chrome-stats.com/d/com.appdevgenie.rfcalculatorpro) — 23,294 users, 4.61 / 5 - [RF And Microwave Calcs Pro](https://chrome-stats.com/d/com.ancientdevelopers.rfandmicrowavecalcspro) — 698 users - [RF And Microwave Calcs](https://chrome-stats.com/d/com.ancientdevelopers.rfandmicrowavecalcs) — 44,476 users, 4.00 / 5 - [Ham Radio Toolbox](https://chrome-stats.com/d/com.nunofacha.hamtoolbox) — 4,663 users, 4.73 / 5 - [Ham and More Pro](https://chrome-stats.com/d/net.hamandmore.hampro) — 13 users - [Amateur Radio Toolkit](https://chrome-stats.com/d/com.daveyhollenberg.amateurradiotoolkit) — 252,321 users, 4.35 / 5 - [Amateur Radio Tools Pro](https://chrome-stats.com/d/com.alg.amateurradio) — 4 users - [RF & Microwave Toolbox lite](https://chrome-stats.com/d/mwave.mcalculator) — 128,350 users, 4.00 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.unixeer.hamengineering)