Developer Tools vs PaySim Merchant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Developer Tools
This app consolidates over 30 essential developer utilities into a single, offline application. It provides tools for formatting, encoding, decoding, generating data, and testing code snippets without needing an internet connection. Enjoy a privacy-first approach with a one-time purchase and extensive customization options.
- Over 30 offline developer tools
- JSON formatter and converter
- Base64 encoder/decoder
- Fake data generator
- Regular expression evaluator
- REST API client
- Customizable themes and highlighting
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Exabox puts over 30 essential developer utilities in a single offline app. Stop searching for random websites every time you need to format JSON, decode Base64, generate dummy data, or test a regular expression. AVAILABLE TOOLS: • Backslash Escaper/Unescaper • Base64 Encoder/Decoder • Color Formats Converter • Cookie Builder • Cookie Parser • Date & Time Parser • Fake Data Generator • Hash Generator • Hexadecimal Encoder/Decoder • HTML Escaper/Unescaper • JSON Formatter • JSON/YAML/TOML/GSON Converter • JWT Token Parser • Math Expression Evaluator • Number Base Converter • QR Code Generator • Regular Expression Evaluator • REST API Client • Text Comparator • Text Inspector • Text Transformer • Timezone Comparator • URL Builder • URL Encoder/Decoder • URL Parser • UUID Parser & Generator BENEFITS: • Works 100% offline - your data stays on your device • Privacy-first approach with no data collection • One-time purchase, no subscriptions • 60+ app themes and 90+ code highlighting options • Instant tool search functionality Get all your dev tools in one secure, professional workspace.
PaySim Merchant
This platform simulates payment processes for testing compliance and interoperability. It supports various payment initiatives like EMV 3D-Secure, SCA, FIDO, and Web Authentication APIs.
- End-to-end payment simulation
- Compliance and interoperability testing
- EMV 3D-Secure 2.1 and 2.2 support
- SCA and FIDO integration
- Web Authentication and Payment Request API testing
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mSIGNIA’s Payment Simulator (or PaySim) is a complete, end-to-end payment simulation platform for testing compliance and interoperability including enabling 3rd-party product demonstration for various payment initiatives such as EMV 3D-Secure versions 2.1 and 2.2, SCA, FIDO, and W3C related Web Authentication and Payment Request APIs.
Screenshots
Verdict
The clearest difference is rating: PaySim Merchant at 5.0 against Developer Tools's 2.0. PaySim Merchant also leads on in-app purchases (none vs 1). On price, ratings volume, update cadence and ads 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
Both are free to download. Developer Tools sells 1 one-off in-app purchase. PaySim Merchant asks for nothing beyond the download.
PaySim Merchant holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Developer Tools ships an update every 6 weeks, PaySim Merchant monthly. The most recent releases landed on November 3, 2026 and November 11, 2026 respectively.
| Parameter | Developer Tools | PaySim Merchant |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 102 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Alberto Malagoli | mSIGNIA |
Customer experience
Developer Tools
PaySim Merchant
In-app purchases
Developer Tools
- Lifetime$4.99
PaySim Merchant
No in-app purchases
Questions
Is Developer Tools free?
Is PaySim Merchant free?
Which has better reviews, Developer Tools or PaySim Merchant?
Do Developer Tools or PaySim Merchant have ads?
Which is updated more often, Developer Tools or PaySim Merchant?
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