# NMR Tutor — NMR FID learning lab > Interactive simulation for learning NMR data acquisition and signal processing. (iPhone/iPad app by Tim E. Burrow.) - Source: https://appshunter.io/ios/app/nmr-tutor/id785450176 (this page in markdown: same URL + `.md`) - Developer: [Tim E. Burrow](https://appshunter.io/developer/367216557) - Category: Education - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.6 · 7 MB - Languages: American English, French (France), German (Germany), Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2014-02-16 - Data updated: 2026-08-08 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/nmr-tutor/id785450176/reviews.md ## What is NMR Tutor? NMR Tutor is an interactive introduction to NMR data acquisition and signal processing. Use simulated free induction decays (FIDs) and spectra to explore how time-domain NMR signals become frequency-domain spectra. Adjust peak positions, decay, noise, apodization, zero filling, phase behavior, and common acquisition artifacts, then see the effect immediately in the FID and final spectrum. The app displays real and imaginary FID channels before and after processing, together with the resulting spectrum after Fourier transformation. A live signal-to-noise (S/N) measurement updates as you adjust noise, scan averaging, apodization, FID artifacts, and shimming, making processing tradeoffs easy to compare. Apply zero filling to see how digital interpolation changes the appearance of the spectrum without adding new measured data. You can also introduce common receiver or acquisition faults into the FID and observe the artifacts that appear after processing. As an advanced example, add spin-spin coupling to create an AB coupling pattern, then move the peaks or change the coupling strength to compare AB behavior with an AX spin system. Charts retain every data point and support pan, zoom, phase-pivot dragging, graph audio, sharing and export, and external displays. Optimized Metal and Accelerate processing keeps high-resolution chart and shimming interactions responsive. Adaptive layouts and larger accessibility text make the workspace easier to use on iPhone, iPad, and Mac. Open one-dimensional JEOL, Bruker and Varian FID datasets directly. Inspect the acquired real and imaginary channels, then apply apodization, zero filling, first-point scaling, and zero- and first-order phase correction to your own data. ## Key features - Interactive FID and spectra simulations - Adjustable peak positions and decay - Noise and apodization control - Zero filling and phase correction - Simulate acquisition artifacts - Explore spin-spin coupling ## Frequently asked questions about NMR Tutor ### What is NMR Tutor? NMR Tutor is an interactive application designed to teach the fundamentals of NMR data acquisition and signal processing through simulations. It allows users to manipulate various parameters and observe their effects on NMR signals and spectra. ### How does NMR Tutor help in learning? It provides hands-on experience by letting users adjust parameters like peak positions, decay, noise, apodization, and phase. Users can also introduce artifacts and explore concepts like spin-spin coupling to understand how these factors influence NMR data. ### What devices support NMR Tutor? NMR Tutor is available on Mac, iPhone, and iPad, offering flexibility for users to learn on their preferred Apple devices. ### Is NMR Tutor free to use? Yes, NMR Tutor is completely free to download and use. There are no in-app purchases or advertisements, providing an uninterrupted learning experience. ### How frequently is NMR Tutor updated? The app was last updated on July 14, 2026, indicating ongoing development and potential for future improvements and features. Its current version is 2.1. ### What is the age rating for NMR Tutor? NMR Tutor has an age rating of 4+, making it suitable for a wide range of learners, from younger students to professionals. ### Does NMR Tutor offer certifications? NMR Tutor is a learning tool focused on interactive simulation and understanding NMR principles. It does not currently offer formal certifications upon completion of its modules. ### What user feedback is available for NMR Tutor? NMR Tutor has received a perfect rating of 5.0 stars from one review, suggesting a highly positive user experience for those who have used it. ## Version history (last 5 releases) ### 2.4 — 2026-08-05 • Native JEOL JDF import. Open and process JEOL JDF files directly alongside Varian and Bruker datasets, with automatic digital-filter delay correction. Many thanks, Uli. I greatly appreciate your support. • Enhanced chart tools. New Pan, X/Y Zoom, Box Zoom, and Reset View controls work smoothly with touch, mouse, and trackpad input. Settings persist for each chart, and scaling is more precise. • Bruker digital-filter correction. Automatic correction for Bruker receiver delays improves peak shapes and baseline fidelity, with optional manual fine-tuning. • A more polished user interface and other improvements. ### 2.3 — 2026-07-30 Version 2.3 adds direct opening of one-dimensional Bruker and Varian FID datasets. Process acquired real and imaginary channels with apodization, zero filling, first-point scaling, and zero- and first-order phase correction. Full-resolution Metal charts now retain every data point and remain smoother during continuous slider input. The simulated FID has increased from 256 to 4,096 complex points. Also improved: first-open and source-switch chart refresh, acquired-data line broadening, phase processing, Z1–Z6 scaling, translations, and overall reliability. ### 2.2 — 2026-07-22 Version 2.2 adds a live spectrum signal-to-noise (S/N) measurement that updates as processing controls change. Phase-pivot dragging, chart responsiveness, Dynamic Type and accessibility layouts, and translations are also improved. ### 2.1 — 2026-07-14 Rebuilt in Swift for iPhone, iPad, and Mac with a modern workspace, five live charts, localized help, graph audio, image export, and interactive NMR controls. ### 1.2.0 — 2016-11-22 Shimming simulation—see what happens when the z shims are wrong Lots of behind the scenes updates ## More apps by Tim E. Burrow - [Attenuator](https://appshunter.io/ios/app/attenuator/id367216554) All apps by Tim E. Burrow: https://appshunter.io/developer/367216557 ## Related topics [nmr](https://appshunter.io/ios/topics/nmr) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-08.*