
AllergyCard.app
Food Allergy App
Allergify
Spokin
Create and save food allergy alert and emergency alert cards instantly on your phone in 100+ languages. Share offline with restaurant staff and stay safe while dining abroad.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | simpleallergyalert.com | diffyn.com |
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| Company | Startup from the United Kingdom · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Simple Allergy Alert - The Food Allergy & Emergency Translation Card App Travel Safely. Eat with Confidence. Try it instantly at app.simpleallergyalert.com, no install required. Create and save food allergy cards and emergency alert cards instantly on your phone. Whether you're a frequent...
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What each product offers, as listed by its team.


An editorial look at what each product does well and who it suits.


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Walkthroughs and reviews on video.
Simple Allergy Alert Demo
The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
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As answered by people managing Simple Allergy Alert and Diffyn.
Simple Allergy Alert's answer
Instead of relying on multiple tools, it combines personalised allergy translation cards in more than 100 languages, an emergency medical card, and local emergency numbers for the country you’re visiting - all in one app.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Simple Allergy Alert's answer
Simple Allergy Alert covers every aspect of making servers aware of your allergic restrictions - simply. You can customise your alerts to your specific needs depending on what country you are in, or what kind of restaurant. Add and remove cards as and when you need them.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Simple Allergy Alert's answer
Vite, React, and TypeScript with shadcn/ui components, wrapped in Capacitor for the Android build. The backend runs on Nitro. Custom allergen translations use the Google Cloud Translation API. Payments run through Lemon Squeezy for the web app and Google Play billing for Android.
Diffyn's answer:
React, Next.js, POSTGRESQL
Simple Allergy Alert's answer
People with food allergies who travel, along with parents travelling with allergic children.
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Simple Allergy Alert's answer
I have a severe nut allergy myself. After a life threatening anaphylactic reaction while travelling, I got tired of printing allergy cards every time I visited a new country. I built Simple Allergy Alert so I could generate a card on the spot, in the local language, with an emergency card ready in case something went wrong. I use it myself on every trip.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
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When comparing Simple Allergy Alert and Diffyn, you can also consider the following products.

Create a printable food allergy card in Japanese, Korean, Thai, Chinese, Spanish, and 5 more languages. Free to preview. Download PNG or PDF for $8.99.
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