Studkit vs Ham Engineering

Studkit finds studs, nails, screws, pipes, and metal hidden inside any wall using your iPhone's built-in magnetic sensor - no extra hardware. Plus five more pro DIY tools in one app: bubble level, laser cross, drill guide, mm to inch converter, and timestamp camera. The complete builder's toolkit for hanging frames, mounting shelves, or any home improvement job. --- SIX PRO TOOLS IN ONE APP * STUD FINDER Uses your iPhone's built-in magnetometer to detect nails inside wood studs and metal studs in any wall. Sweep slowly, watch the live trace, mark the wall when the meter peaks. Works through drywall, plaster, and most paint. * BUBBLE LEVEL Three modes (horizontal, vertical, and surface) for aligning frames, hanging shelves, leveling appliances. Accurate to under 1 degree in real-world use. * LASER CROSS A self-leveling crosshair you project onto any wall to mark a perfectly level line. Hold the phone against the surface, mark with a pencil, hang your art straight every time. * DRILL GUIDE Pick your wall type (drywall, brick, concrete, plaster, tile) and the load weight. Studkit recommends the exact drill bit size, anchor type, and pilot depth. No more ruined walls. * CONVERTER Quick mm to inch table with the most common screw, bit, and lumber sizes pre-listed. Tap to copy any value. * TIMESTAMP CAMERA Take photos with the current date, time, and GPS coordinates burned directly into the image. Perfect for documenting work, before and after shots, contractor reports. --- WHY A TOOLKIT INSTEAD OF SIX APPS Most DIY apps do one thing. Studkit is the kit you reach for every time you pick up your phone before picking up a hammer. One subscription, six tools, zero clutter on your home screen. --- HOW STUDKIT FINDS STUDS The iPhone has a 3-axis magnetometer, the same sensor that powers Compass. Studkit reads it 60 times per second and watches for distortions in the magnetic field. Iron and steel objects bend the field around them. WILL FIND: nails and screws inside wood studs, steel studs in commercial walls, iron and steel pipes, metal junction boxes. WILL NOT FIND: wood studs without any nails (very rare), plastic, PEX or copper pipes, electrical wires (unless in metal conduit), or anything deeper than about 8 cm / 3 inches. These are physics limits, no app can change this. For best results: remove your phone case (especially MagSafe), decide your scanning pose first, then press power. Hold the back of the phone flat against the wall and sweep at about one finger-width per second. --- WHO IT IS FOR DIY enthusiasts. Renters who do not want to buy six separate hardware-store tools. Carpenters wanting a backup kit. Contractors documenting work. Anyone tired of switching apps every time they pick up a screwdriver. --- PRO SUBSCRIPTION Studkit Pro unlocks all six tools. Choose Weekly ($4.99/week) or Yearly ($29.99/year, best value). Cancel anytime from your Apple ID settings. No ads ever. Auto-renewable subscription. Payment is charged to your Apple ID at confirmation of purchase. Subscription renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage and cancel subscriptions in your Apple ID account settings after purchase. Privacy Policy: https://sites.google.com/view/privacy-policy-zelat/inicio Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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