Resistor Color Code Calc + vs Noctera

Resistor Color Code Calc reads resistor color bands both ways: pick the colors you see, or type a value and see the bands. It checks the reading from both ends of the part, shows which E-series the value belongs to, and reads SMD, capacitor and inductor codes too. ▶ COLORS TO VALUE AND BACK Choose 3, 4, 5 or 6 bands and tap each band to set its color. Every color chip shows its name and what it means in that position (digit, multiplier, tolerance or temperature coefficient), so you do not have to tell shades apart by eye alone. Type a value such as 4.7k, 4k7, 4,7 kΩ, 1M2 or 0R22 and the bands are drawn for you. If the value needs more digits than the chosen band count can show (4.99k on 4 bands), the app says so and offers 5 bands or the closest value with its deviation, instead of rounding silently. ▶ READ CHECK FROM BOTH ENDS Gold, silver and pink cannot be a first digit, black has no tolerance, white has no temperature coefficient. The app checks every band against these position rules from the left and from the right: • only one direction is valid: you get that reading, and Flip turns the bands to match • both directions are valid: both readings are shown side by side, because the colors alone cannot say which end is band 1 • neither direction is valid: the band that breaks the rule is named Gold and silver work as multipliers in the 4th position of 5-band resistors (10 Ω, 1 Ω), and the pink ×0.001 multiplier is supported. ▶ FULL RESULT Value, tolerance range (min – max), temperature coefficient for 6 bands, the working (47 × 10² Ω), the value in plain ohms and RKM code (4K7), and the E-series it belongs to: E3, E6, E12, E24, E48, E96 and E192. If the value is not in the series that fits its tolerance, the nearest values on each side are listed with their deviation. ▶ SMD, CAPACITOR AND INDUCTOR CODES • SMD resistors: 3-digit (472), 4-digit (1002), R notation (4R7, R047) and EIA-96 (01C, 68X) • Capacitors: 3-digit pF codes (104 = 100 nF), last digit 8 or 9 (229 = 2.2 pF), letter as decimal point (4n7, p47) and tolerance letters (J, K, M, Z; B, C and D in pF for small values) • Inductors: 3-digit µH codes (101 = 100 µH) and R/N notation (4R7, 47N) When a code fits more than one marking system, every reading is listed. ▶ BENCH TOOLS • Two values: the closest single standard values and the closest series and parallel pairs from E12, E24 or E96 for the value you need • Voltage divider: R1 and R2 pairs for the output you want • LED resistor: the calculated value, the next E24 value up and the current it gives • Ohm's law: any two of voltage, current, resistance and power Power ratings are suggested with a 2× margin, marked as a rule of thumb. ▶ SAVED Tap Save to keep a reading, a code or a tool result, and reopen a saved band set later. Results saved by the previous version stay in the list. The color code follows IEC 60062 and the series values follow IEC 60063. Printed colors vary between makers and lighting, so confirm critical parts with a multimeter. Works offline, no account. Supported by ads: an ad may appear when you open the app, a banner is shown at the bottom, and a full-screen ad may follow a successful Save. Sharing a result as text can be unlocked for 24 hours by watching an ad.

Noctera is a web browser that blocks ads the way a person would — by looking at the page. Apple's on-device AI examines suspicious page elements and hides the ones that turn out to be ads, sponsored inserts, or consent nags. No filter-list subscriptions to keep fresh, no cloud service reading your traffic. Everything happens on your iPhone. HOW IT WORKS Every page loads through two layers. A built-in blocklist stops known ad and tracker networks before they load. Then Apple's on-device foundation model inspects what slips through — promoted content, native ads, newsletter overlays — and hides what it catches. Watch the shield pulse while it scans; the counter shows what it blocked. IT LEARNS When the AI confirms an ad, Noctera remembers. The element becomes a durable rule for that site, and ad hosts confirmed across multiple sites get blocked network-wide. The browser gets quieter the more you use it. Spotted a mistake? Every learned rule has a toggle — flip it off and the element comes back instantly. PRIVATE BY ARCHITECTURE • All blocking runs on-device — zero bytes of your browsing reach any server, ours or anyone's • No account, no analytics, no tracking of any kind • Private tabs leave nothing behind • HTTPS-only mode upgrades insecure connections automatically • Face ID app lock, and one switch clears all website data on exit A BROWSER, PROPERLY • Tab switcher with live page snapshots, plus private tabs • Bookmarks, favorites, and searchable history • A start page you can make yours: three layouts, bundled wallpapers or your own photo, six accent colors, six app icons • Pull to refresh, find in page, desktop site, share sheet • Search with DuckDuckGo, Google, or Startpage PER-SITE CONTROL Turn AI blocking off for any site where you want everything shown — the static blocklist keeps protecting you regardless. REQUIREMENTS • iPhone with iOS 26 or later • AI blocking uses Apple Intelligence when available on your device; static blocking works everywhere The web without ads isn't a premium feature. It's just the web.