E2M (Engineer with EM waves) vs Bill Snap

Engineer with EM waves (E2M) is a powerful and fast 1D electromagnetic solver designed for engineers, researchers, and students. Analyze complex layered structures, extract photonic bands, and simulate optical properties directly on your iOS device. Key Features: - Advanced 1D EM Solver: Simulate 1D stacked (layered) structures with high-speed performance. - Comprehensive Analysis: Calculate Reflectance, Transmittance, and Absorptance (RTA) as functions of incident angle, thickness, and frequency. - Polarization Control: Analyze arbitrary polarization states. Define complex TE and TM inputs to simulate Linear, Circular, or Elliptical polarization interactions. - Photonic Band Structures: Extract band structures for both TE and TM modes to analyze periodic systems. - Material Library: 1. Built-in integration with the refractiveindex.info database for immediate access to practical material parameters (converts complex refractive index to complex permittivity/permeability assuming non-magnetic media). 2. User-Defined Materials: Create custom materials, including general LHI (Linear, Homogeneous, Isotropic) and Metamaterials (Double Negative/DNG). - Flexible Domain Settings: Switch simulation parameters between Frequency (THz), Wavelength (μm), or Energy (eV). - Data Export: Easily export raw data (.csv) and figures via Email or the iOS Files app for post-processing. Freeware Mode: E2M offers a generous free mode allowing designs of up to 3 layers. It supports infinite periodic repetition of these layers, enabling a wide range of academic calculations and case studies without a subscription. In-App Subscriptions: Unlock the full potential of E2M to design structures with unlimited layers. - Options: One Month, One Year, Lifetime. - Benefit: Removes the 3-layer limitation during the subscription period. - Terms: Subscriptions (excluding Lifetime) automatically renew unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your Apple Account settings. Legal - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://comphysics.com/index.php/privacy-policy-2/

Snap a bill, find the fee that should not be there, and send a dispute letter. Switch to Cash and check a dollar-bill serial for star notes, radars, and other collectible patterns. Bill Snap reads medical bills, cable and internet statements, bank fees, utility bills, and auto or rent charges. It flags duplicate charges, insurance denials, underpayments, and other fees, then drafts a letter you can edit and send. Disputes stay in one place, with the amount you mark as recovered and a follow-up reminder if the fee is still there. Cash is read on your iPhone. Scan the note, use the live camera, or type a serial. Star notes, radars, ladders, solids, near-solids, repeaters, binary serials, and low serials are labeled with a rarity and a rough premium range. Save the note and its photo to your Collection. Many world notes and coins can be named from the text printed on them. How to use it • Scan tab, Bills: photograph a statement, pick a photo, or import a PDF. Multi-page bills are captured together. • Review the fees the reading found, then generate a letter and choose the tone before you send it. • Disputes: mark a case open or resolved, log what you got back, and add a calendar reminder to follow up. • Scan tab, Cash: scan a note or type a serial. Save it when you want to keep it. • Collection: see an estimated range, then filter by Star Notes, Radars, or High Value. Read before you rely on it Letters are drafts for you to review. Bill Snap is not a law firm, and nothing in the app is legal advice. Collector ranges are rough estimates for a circulated note, not an appraisal or an offer to buy. Subscription Bill Snap includes a 3-day free trial, then weekly, monthly, or yearly access. The price is shown on the paywall before you confirm. Payment is charged to your Apple ID at confirmation, or when the trial ends if you do not cancel. The plan renews unless you cancel at least 24 hours before the period ends. Manage or cancel anytime in Settings > Apple ID > Subscriptions. Privacy Policy: https://polarisview.com/apps/bill-simplify/privacy-policy/ Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/