Comparison

Developer Tools vs PaySim Merchant

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

Developer Tools4 screens
PaySim Merchant4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Developer Tools sells 1 one-off in-app purchase. PaySim Merchant asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Developer Tools versus PaySim Merchant: the parameters behind the verdict, then further details
ParameterDeveloper ToolsPaySim Merchant
PriceFreeFree
Rating2.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 6 weeksMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size102 MB18 MB
Age rating4+4+
DeveloperAlberto MalagolimSIGNIA

Customer experience

Developer Tools

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PaySim Merchant

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Developer Tools

One-time1
  • Lifetime$4.99
None

PaySim Merchant

No in-app purchases

Questions

Is Developer Tools free?
Developer Tools is free to download, with in-app purchases available.
Is PaySim Merchant free?
PaySim Merchant is free to download, with no in-app purchases.
Which has better reviews, Developer Tools or PaySim Merchant?
PaySim Merchant is rated higher. Developer Tools averages 2.0 out of 5 from 1 ratings, while PaySim Merchant averages 5.0 from 1 ratings.
Do Developer Tools or PaySim Merchant have ads?
Neither Developer Tools nor PaySim Merchant shows ads.
Which is updated more often, Developer Tools or PaySim Merchant?
Developer Tools ships an update every 6 weeks, and PaySim Merchant monthly. Most recently, Developer Tools was updated on November 3, 2026 and PaySim Merchant on November 11, 2026.

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