Comparison

Dev Tool box vs Sastio

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

Head to head
About

Dev Tool box

Features
Read full description

DevToolbox is an essential collection of developer utilities designed to streamline your coding workflow. Whether you're debugging APIs, encoding data, or formatting JSON, DevToolbox provides the tools you need in a clean, native interface. KEY FEATURES: • JSON Formatter & Validator Format, validate, and beautify JSON with syntax highlighting. Tree view visualization for better structure understanding. Built-in search functionality to find text within large JSON files. • URL Encoder/Decoder Quickly encode or decode URLs for API testing and web development. RFC 3986 compliant encoding for maximum compatibility. • Base64 Encoder/Decoder Convert text to Base64 and vice versa. Supports URL-safe Base64 and auto-padding. Perfect for encoding credentials, tokens, and data URIs. • JWT Decoder Decode and inspect JSON Web Tokens without external services. View header, payload, and signature details instantly. Automatically handles "Bearer " prefix. • Text Case Converter Transform text between various cases: camelCase, PascalCase, snake_case, kebab-case, SCREAMING_SNAKE_CASE, dot.case, UPPERCASE, lowercase, and Title Case. Smart parsing for any input format. • Hash Generator Generate secure hashes using MD5, SHA-1, SHA-256, and SHA-512 algorithms. Essential for checksum verification and security testing. • Unix Timestamp Converter Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds. Multiple output formats including ISO 8601, UTC, and local time. • Number Base Converter Convert between Decimal, Binary, Octal, and Hexadecimal. Auto-detects input format with 0x, 0b, 0o prefix support. • String Escape/Unescape Escape special characters for JSON strings or unescape encoded text. Handles \n, \t, \", \\ and more. • Color Converter Convert HEX colors to RGB and HSL with live preview. Generates ready-to-use SwiftUI, UIKit, and CSS code snippets. WHY DEVTOOLBOX? • Native Performance: Built with SwiftUI for blazing-fast performance • Privacy First: All processing happens locally on your device • Universal App: Works seamlessly on iPhone, iPad, and Mac • Dark Mode Support: Easy on the eyes during late-night coding sessions • No Ads, No Tracking: Just pure functionality • Offline Ready: No internet connection required Perfect for mobile developers, web developers, API developers, QA engineers, security professionals, and students learning to code. DevToolbox is your pocket-sized development companion. Stop switching between websites and online tools - get everything you need in one native app.

About

Sastio

Connect with skilled developers to bring your app idea to life. Submit your project details, budget, and requirements to get matched with suitable professionals. Track progress and manage multiple app ideas easily.

Highlights
  • Submit and describe app ideas
  • Provide development budget estimates
  • Match with suitable developers
  • Schedule developer meetings
  • Track app idea progress
  • Organize multiple app ideas
Features
Read full description

Sastio makes it easier to turn an app idea into a real product. Whether you’re an individual with a new idea, a startup, or a company looking to build an application, Sastio helps connect you with developers who have the skills your project needs. Simply submit your app idea, describe what you want to build, provide your project details and budget, and Sastio will use that information to help match you with a suitable developer. With Sastio, you can: • Submit and describe your app idea • Provide your estimated monthly development budget • Get matched with developers based on your project requirements • Schedule a meeting with an interested developer • Track the progress of your submitted app ideas • Manage your contact and profile information • Keep multiple app ideas organized in one place Our developer network includes professionals with different backgrounds, specialties, and technical skill sets. This allows Sastio to connect projects with developers who are better suited for the type of application being created. From the first idea to your first development meeting, Sastio gives you a simple way to start bringing your app to life.

Screenshots

Dev Tool box2 screens
Sastio3 screens

Verdict

The call

The clearest difference is iOS requirement: Sastio at 15.0 against Dev Tool box's 18.0. On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 9 level
Dev Tool box versus Sastio: the parameters behind the verdict, then further details
ParameterDev Tool boxSastio
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 weeks—
AdsYesYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size4 MB18 MB
Age rating4+17+
DeveloperSeonggon SimWAVbot LLC

In-app purchases

None

Dev Tool box

No in-app purchases

None

Sastio

No in-app purchases

Questions

Is Dev Tool box free?
Dev Tool box is free to download, with no in-app purchases.
Is Sastio free?
Sastio is free to download, with no in-app purchases.
Do Dev Tool box or Sastio have ads?
Both Dev Tool box and Sastio show ads.

Other comparisons