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Stell
Create Google and Apple Wallet Pass for coupons, deals, gift cards, and loyalty cards using a simple web editor. Get started for free.

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 | addtowallet.co | diffyn.com |
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| Platforms | — | |
| Company | 2024 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Effortless Wallet Pass Creation: Generate Google and Apple Wallet Passes for coupons, deals, gift cards, and loyalty cards in minutes. Versatile Sharing Options: Share Mobile Wallet Cards seamlessly through your website, email, SMS, and even display QR codes on posters for extended marketing...
No description of Diffyn yet.
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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing AddToWallet and Diffyn.
AddToWallet's answer
With addtowallet.co, users can easily share their customized digital passes via a unique link or QR code, providing convenient access to their coupons, deals, gift cards, or loyalty cards.
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.
AddToWallet's answer
Addtowallet.co simplifies digital pass sharing through unique links or QR codes, offering convenient access to personalized coupons, deals, gift cards, or loyalty cards. Its single, user-friendly form enables effortless customization for both Apple and Google Wallet Passes, ensuring a consistent and efficient process across platforms.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
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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