A k vs Messly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A k
Explore the principles of Magnetic Resonance Imaging (MRI) by interactively manipulating scan parameters and observing their real-time effects on acquired images. This tool is designed for educators and students to gain an intuitive understanding of k-space and advanced imaging techniques.
- Interactive k-space parameter manipulation
- Real-time image acquisition simulation
- Advanced imaging technique exploration
- Image import for parameter testing
- Interactive user manual
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*** As featured on AuntMinnie.com *** "I have seen a substantial improvement in my trainees’ intuitive understanding of how MRI works since adding use of the App to my lecture series.” - J. Karis, MD. This app helps you discover the secrets of 'k-space', the mysterious space that Radiologists and Radiographers need to be familiar with in order to understand the principles of Magnetic Resonance Imaging (MRI). When you are a lecturer or a teacher, this app will be an indispensable tool for explaining the concepts of k-space to your students. "A k-Space Odyssey" allows you to play interactively with various MRI scan parameters and shows you, with blazingly fast real-time performance, the effect on the acquired clinical image. This app not only gives you intuitive hands-on experience with Half Scan, Partial Field-Of-View, Voxel Size and Hanning filters, but also covers advanced imaging techniques such as Turbo Imaging, Parallel Imaging, real-time Spiral Imaging, Compressed Sensing and Dynamic Contrast MRA (with real-time interactive Keyhole Imaging). The camera plug-in allows you to use any picture in your iPhone's Photo Album and manipulate them as if they were acquired with an MR scanner. You can take pictures from text books or straight from the console of any MR scanner, or load geometric pictures (concentric triangles, snow crystals, spirals) to get a profound understanding of the amazing properties of k-space. The app includes an extensive, interactive user manual that explains all scan parameters in simple wording, but with sufficient detail to quickly find your way home from anywhere in k-space. DISCLAIMER This app is NOT intended to provide any medical information, medical diagnoses nor treatment advice whatsoever. Always seek a doctor’s advice in addition to using this app and before making any medical decisions.
Messly
This app connects locum doctors with agencies for job opportunities. Create an anonymous profile to receive relevant job pitches from vetted agencies. Manage your job search efficiently with tools designed to save time.
- Anonymous profile creation
- Receive relevant job pitches
- Vetted locum agencies
- View jobs before sharing details
- Mobile job management
- Time-saving tools
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Messly is a faster, simpler and more transparent way to find locum work. Make your free anonymous profile with your locum wishlist and get pitched relevant locum jobs from the best locum agencies before you've shared your contact details. All our agencies are vetted and chosen based on doctor's feedback. See locum jobs from all of the best agencies up-front, before you’ve shared your personal details. More choice means better rates, less travel and your pick of departments. You manage everything from your mobile, around your schedule, with nifty tools to save you time. Trusted by over 12,000 locum doctors. We’re rated number #1 by doctors looking for locum work.
Screenshots
Verdict
The clearest difference is price: Messly at Free against A k's $11.99. Messly also leads on iOS requirement (12.0 vs 15.0). A k's advantage is update cadence (every 3 weeks vs every 2 months) and ratings volume (4 vs 1). On rating, ads, 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
Messly is free to download; A k costs $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for A k against 5.0 for Messly. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
A k ships an update every 3 weeks, Messly every 2 months. The most recent releases landed on November 5, 2026 and November 2, 2026 respectively.
| Parameter | A k | Messly |
|---|---|---|
| Price | $11.99 | Free — better |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 37 MB |
| Age rating | 17+ | 4+ |
| Developer | Eltjo Haselhoff | Berdroot Developments Limited |
In-app purchases
A k
No in-app purchases
Messly
No in-app purchases









