NMR Calculator 2 vs Yomio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NMR Calculator 2
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The app shows a list of isotopes with non-zero nuclear spin angular momentum. Select an isotope to view its NMR properties and calculate fundamental NMR parameters. Information section For a chosen isotope, this section displays the atomic symbol with mass number, nuclear spin angular momentum, gyromagnetic ratio, and natural abundance. Calculator section Update any one parameter in a subsection to recalculate the others. - Larmor frequencies: External magnetic field and the corresponding Larmor frequencies for the chosen isotope, the proton, and the free electron. - Time domain: Number of data points, acquisition duration, and dwell time. - Frequency domain: Number of data points, spectral width, and frequency resolution. - Pulse 1: Pulse duration, flip angle, and RF amplitude in Hz and μT. - Pulse 2: Pulse duration, flip angle, RF amplitude in Hz, and RF power relative to Pulse 1. - Ernst angle: Ernst angle and repetition time for a given T₁ relaxation time. NMR Assistant An on-device AI assistant scoped to NMR topics, available where Apple Intelligence is supported. Ask questions in plain language — the assistant answers using the same calculation engine that powers the calculator, so results are always physically consistent.
Yomio
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Tired of flashcards? Staring at word lists, repeating the same cards, memorizing today and forgetting tomorrow? Many Japanese learners face the same problems. Words are hard to remember. Studying feels boring and mechanical. Even if a word is memorized, it is hard to recognize it in real sentences. Yomio takes a different approach. Instead of memorizing words in isolation, Yomio helps you learn Japanese vocabulary by reading meaningful context. Words are learned naturally by seeing them again and again in real usage. With Yomio, words are learned through a simple tap and reading. Yomio keeps track of your learning status for each word. With just one tap, it selects words you are currently learning and generates a short paragraph at your level. You can choose different styles such as short stories, diaries, or news. After reading, you simply report whether the words felt familiar. Based on your feedback, Yomio automatically updates your learning progress and prepares the next reading for you. You do not need to manage anything yourself. By meeting words repeatedly in different contexts, you begin to recognize them faster and understand how they are actually used. Vocabulary gradually becomes more familiar without forcing yourself to memorize. Yomio is designed to be simple and calm. There are no endless flashcards and no complicated settings. You just tap, read, and let Yomio handle the rest. If you believe that language is learned through reading and real usage, not drills, Yomio is made for you.
Screenshots
Verdict
The clearest difference is ads: NMR Calculator 2 at none against Yomio's shown. Yomio's advantage is update cadence (every 3 months vs every 33 months) and iOS requirement (15.1 vs 26.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
NMR Calculator 2 ships an update every 33 months, Yomio every 3 months. The most recent releases landed on September 27, 2026 and September 9, 2026 respectively.
| Parameter | NMR Calculator 2 | Yomio |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 33 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 2 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Jae-Seung Lee | PoYuan Wang |
In-app purchases
NMR Calculator 2
No in-app purchases
Yomio
No in-app purchases









