# IR Spec Check > Infrared spectroscopy analysis tool for chemists and students. (iPhone/iPad app by George Marzloff.) - Source: https://appshunter.io/ios/app/ir-spec-check/id306365373 (this page in markdown: same URL + `.md`) - Developer: [George Marzloff](https://appshunter.io/developer/306365376) - Category: Education, Reference - Price: $1.99 - Age rating: 4+ - Requires: iOS 11.0 · 12 MB - Languages: English - Released: 2009-02-27 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/ir-spec-check/id306365373/reviews.md ## What is IR Spec Check? IR Spec Check is designed for organic chemists and students to quickly analyze absorbance peaks from an infrared spectroscopy graph. IR Spec Check recognizes over 75 absorbance frequencies and matches frequencies with possible R-groups. IR Spec Check's ranking system displays R-Groups based on how accurately your peak falls into the frequency ranges of each result. Using IR Spec Check is easy! Just enter a wavenumber (cm-1). The results include what bond is responsible for each absorbance. The text displays what type of R-group is absorbing at the frequency. ## Key features - Analyze absorbance peaks - Recognizes 75+ frequencies - Matches frequencies to R-groups - Ranks results by peak accuracy - Identifies responsible bonds - Displays R-group information ## Recent user reviews (7 of 7) All indexed reviews: https://appshunter.io/ios/app/ir-spec-check/id306365373/reviews.md ### 3/5 — Science *2014-07-15, version 2.0* good for just looking up specific peaks, wish it had more of a studying aspect ### 3/5 — Needs more character peaks *2012-10-22, version 2.0* There is no easy way to determine what peaks this software is capable of identifying. There needs to be a reference table that lists all of the peak number associations. I have no way of knowing whether or not this supports sulfur chemistry... in addition to many, many other character peaks. It would also be nice, if at the very least, I could add my own data into the program. ### 3/5 — Too simple *2009-11-05, version 0* I checked the app for factual accuracy, and didn't find any errors. However, developer needs to add a lot of features, such as the ability to input lineshape info (sharp, broad, weak, strong). Also there should be some way of dealing with features such as the aldehyde C-H doublet, or the various multi-peak aromatic bending modes. ### 3/5 — Ok BUT.... *2009-09-22, version 0* It either needs ir spectra to study or make another app ! Also multipul points would be easier- just add ur spectras to study from!!!!!!!! And it would be perect! ### 3/5 — Good first version *2009-03-30, version 0* It's good to finally see some spectroscopy applications in the Apps Store. This one is a good first start. It's easy to use, but I would like to make a couple of suggestions that would make the app outstanding. Entering a vavenumber and getting suggested structural correlations can be very helpful, but it would be more useful to also offer confirmation bands to the user. This way, functional groups with similar wavenumbers can be more readily distinguished. Also, links to relevant spectral references (e.g. wiki?) would benefit users seeking mroe information. If the developers really wanted to push the application, they could also include a way to import spectra in some commonly available format so the range of the suggested matching band is superimposed over the actual experimantal spectrum! ### 3/5 — Ok *2009-03-23, version 0* If I could enter more than one absorbance frequency per query, it would be a lot more helpful. ### 4/5 — Great! *2009-03-07, version 0* This app is easy to use and very useful for students or anyone who uses an IR spec in the lab. I always have a hard time remembering which bonds correspond to which wavelengths, so it's really convenient to have a quick reference like IR Spec Check on my phone. I would recommend it to anyone who has to deal with IR. ## Frequently asked questions about IR Spec Check ### What is IR Spec Check used for? IR Spec Check is used to analyze absorbance peaks from infrared spectroscopy graphs. It helps identify the bonds and R-groups responsible for specific absorbances by matching entered wavenumber data to known frequencies. ### How does IR Spec Check work? You enter a wavenumber (cm-1) into IR Spec Check, and it displays the bond responsible for the absorbance and the type of R-group absorbing at that frequency. Results are ranked by how accurately your peak falls into the frequency ranges. ### How many absorbance frequencies does IR Spec Check recognize? IR Spec Check recognizes over 75 different absorbance frequencies, providing a comprehensive tool for analysis. ### What devices is IR Spec Check compatible with? IR Spec Check is compatible with iPhones, iPads, and iPods, making it accessible on various Apple devices. ### What is the age rating for IR Spec Check? IR Spec Check has an age rating of 4+, indicating it is suitable for a wide range of users. ### When was IR Spec Check last updated? IR Spec Check was last updated on February 26, 2019, with version 2.2. ### What is the price of IR Spec Check? IR Spec Check is a paid application, available for $1.99. ### Does IR Spec Check offer certifications for learning? IR Spec Check is designed as an analytical tool for chemists and students to interpret spectroscopy data, rather than a platform that offers formal certifications. ## Version history (last 1 release) ### 2.2 — 2019-02-26 Added crash analytics tools in the app to monitor issues in the app. Please feel free to contact us with the feedback form in the "About" page. We would love to solve any issues you have or listen to any suggestions. ## Apps similar to IR Spec Check | App | Rating | Price | Category | | --- | --- | --- | --- | | [Glycolysis Glucogenesis Tutor](https://appshunter.io/ios/app/glycolysis-glucogenesis-tutor/id1190613837) | 1.0 (1) | $1.99 | Education | | [iMolecular Draw](https://appshunter.io/ios/app/imolecular-draw/id316980870) | 3.5 (2) | $2.99 | Education | | [Amino Acid Codons Tutor](https://appshunter.io/ios/app/amino-acid-codons-tutor/id1198324981) | — | $1.99 | Education | | [Tap OChem Lite](https://appshunter.io/ios/app/tap-ochem-lite/id763895340) | 4.9 (19) | Free | Education | | [MCAT Organic Chem Cram Cards](https://appshunter.io/ios/app/mcat-organic-chem-cram-cards/id1017451692) | — | $9.99 | Education | | [Truth Table Builder](https://appshunter.io/ios/app/truth-table-builder/id882579372) | 4.7 (58) | $1.99 | Education | ## More apps by George Marzloff - [MedMonics](https://appshunter.io/ios/app/medmonics/id473209706) All apps by George Marzloff: https://appshunter.io/developer/306365376 --- *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 2026-06-10.*