undertext Bible vs Lumen

sit with the language beneath the verse. undertext Bible is a quiet place to read the Bible next to its original words: Hebrew in the Old Testament, Greek in the New, and the Aramaic Peshitta beside it. one word at a time, each with its transliteration, a short gloss, and its Strong's number. tap any word to see what the English is standing on. every word can be heard, too. Hebrew, Greek, and Aramaic, each read aloud in a real recorded voice. when You want to go deeper, Grace is an optional study companion grounded in the passage on the screen. when You choose send, undertext shares Your question, the passage in front of You with its original-language context, and from this sitting only, up to eleven recent messages and up to eleven of the verses You stopped at. the request goes to Claude from Anthropic, through Amazon Bedrock, and only after You give explicit permission. Your name, account, device identifier, and the rest of what You read are not part of the request. when You choose the mic, Your spoken audio streams through Amazon Transcribe to make an editable draft. the draft does not go to Grace until You choose send. keep what matters in a private journal and library. Your writing is kept in Your own private iCloud, or on this device when iCloud is not reachable, or held just until You close the app when neither is. the journal always tells You which of those is holding the page in front of You, and if a save does not go through, the words stay on the screen with a way to try again. undertext is built for stillness, not speed. one verse fills the screen. nothing else asks for Your attention. this iOS app includes iPhone and iPad, an Apple Watch verse-of-the-day glance, and Apple Silicon Mac availability through Designed for iPad. the App Clip opens one verse without an install. undertext TV remains a separate App Store app. - read offline while a chapter remains in the app's cache. - receive a single verse each day, at an hour You choose. - switch between light and dark appearance whenever the room changes. - search by word, reference, transliteration, or Strong's number. - share a verse through the native iOS share sheet. - tune type and haptics to how You like to read. no account. no ads. no third-party tracking. the first time You use Grace or voice search, Amazon gives this copy of the app a random ID, so those two features can be reached. it is not an undertext account. it holds no name, no email address, no advertising identifier, nothing You have read, and nothing You have written. it is never used for analytics, advertising, identifying You, or tracking. Grace Pro is an auto-renewable subscription purchased through the App Store. monthly is $4.99 per month; annual is $39.99 per year. payment is charged to Your Apple Account at purchase. the subscription renews automatically unless turned off at least 24 hours before the current period ends, and Your account is charged for renewal within 24 hours before the period ends. You can manage or cancel in Your Apple Account settings after purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://undertext.org/privacy

Lumen is a periodic table app for people who want to understand chemistry, not just memorise it. The home screen is the table — but every interaction is built to surface the patterns underneath. Tap “Atomic radius” and the cells re-color into a violet gradient with arrows showing how the trend grows down columns and shrinks across rows. The same goes for electronegativity, ionization energy, and metallic character. Once you’ve watched it animate twice, you read the periodic table differently. Twenty short lessons teach the families and the trends. Reading the table starts with rows, columns, and the four blocks. Then alkali metals, halogens, and the noble gases — what they share, why they react the way they do. Then four trend tracks (radius, electronegativity, ionization energy, metallic character) that each unpack the pattern, the why, and how to predict it. Each lesson is four to five minutes. Wrong answers feed a small spaced-repetition queue you clear on a coffee break the next morning. Seven tools beyond the table. An equation balancer that takes any reaction you can type and returns the smallest whole-number coefficients — then works the stoichiometry from a mass you supply. A molar mass calculator with a custom chemistry keyboard (no more hunting through the system keyboard for capital letters). A gas law solver that rearranges for whichever variable you leave blank. Compare mode — pick two to four elements and see them on a radar chart with an auto-generated caption. A 3D orbital viewer you can spin with your finger. A build-a-compound sandbox that tells you what you’ve made. An isotope explorer with humanised half-lives (“4.5 billion years” beats “1.4×10¹⁷ seconds”). Built honestly. Lumen is offline-first — every element, lesson, and isotope ships in the app. No accounts, no subscriptions, no tracking. Your chemistry stays on your device: searches, favorites, lesson progress, and typed formulas are never transmitted. Analytics is anonymous and off unless you turn it on. The full periodic table, every element’s detail page, the trend goggles, search, favorites, today-in-chemistry, the daily review queue and the first five lessons are free and always open. Everything else — the other fifteen lessons, five of the tools, PDF export, unlimited equation balancing — opens for the rest of the day when you choose to watch one short video. Ads pay for all of it: a small banner at the bottom of the screen, and a full-screen ad between activities — after you finish a lesson or a review, never during one. Every ad is non-personalised.