Devil App Builder vs DevKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Devil App Builder
Create apps quickly and easily by linking Sketch for screen design and the Devil Web Console for coding. Learn to code and build your own applications effortlessly.
- Easy app development
- Sketch integration for screen design
- Devil Web Console for coding
- Learn to code
- Build apps quickly
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Devil App Builder는 앱 개발을 쉽고 빠르게 할 수 있는 도구입니다 Sketch와 연동하여 화면을 만들고, Devil Web Console 에서 코딩을 하세요. 코딩을 배우고, 앱을 손쉽게 만들어보세요 A functional link to the Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
DevKit
This app provides a suite of offline developer tools for formatting, debugging, encoding, and converting data. It keeps all your work on your device, ensuring privacy and accessibility without an internet connection. Features include JSON formatting, JWT decoding, hash generation, and QR code creation.
- 30+ offline developer utilities
- JSON, HTML, CSS, JS, XML, SQL formatting
- JWT decoding and certificate inspection
- Base64, URL, and HTML encoding/decoding
- Hash generation (MD5, SHA-256)
- Timestamp and number base conversion
- QR code generation
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DevKit puts 30 developer utilities in your pocket — and every one runs entirely on your device. Stop juggling browser tabs. Stop pasting production tokens into random websites. Format JSON, decode a JWT, test a regex, or convert a timestamp on a train, on a plane, or inside a locked-down corporate network. YOUR WORK STAYS ON YOUR DEVICE > Every tool runs locally. The JSON you paste, the token you decode, the certificate you inspect — none of it is uploaded to a server, and none of it is visible to us. > All 30 tools work with no internet connection. > No account, no sign-up, no email required. FORMATTERS > JSON Formatter: Beautify or minify JSON with error highlighting and tree view > HTML Formatter: Beautify, minify, and preview HTML with live rendering > CSS Formatter: Format and validate CSS with syntax highlighting > JS Formatter: Format and minify JavaScript > XML Formatter: Format and validate XML documents > SQL Formatter: Format and validate SQL queries PARSERS & DEBUGGERS > JWT Debugger: Decode tokens, inspect headers and payloads, verify signatures > Cron Parser: Parse cron expressions with next run calculations > Certificate Decoder: Decode X.509 certificates ENCODERS & DECODERS > Base64: Encode and decode Base64 strings > URL Encoder: Encode, decode, and parse URLs > HTML Encoder: Handle HTML entities > Hash Generator: Generate MD5, SHA-1, SHA-256, SHA-512 hashes > Backslash Escape: Escape and unescape special characters CONVERTERS > Timestamp: Convert Unix epoch timestamps to readable dates > Case Converter: Transform between camelCase, snake_case, UPPER CASE, and more > Color Converter: Convert between HEX, RGB, HSL with live preview > YAML to JSON: Convert between YAML and JSON with tree view > Number Base: Convert between Binary, Octal, Decimal, Hexadecimal > Hex to Text: Convert between hex and ASCII > CSV to JSON: Convert between CSV and JSON GENERATORS > UUID/ULID Generator: Create UUIDs and ULIDs instantly > QR Code: Generate customizable QR codes and export as images > Lorem Ipsum: Generate placeholder text > Random String: Generate secure passwords and API keys TEXT & COMPARISON > Diff Checker: Compare text with highlighted differences > RegEx Tester: Test regex with live match highlighting > Markdown Previewer: Preview Markdown with GitHub Flavored support > Line Sort: Sort and deduplicate lines > String Inspector: Analyze string statistics BUILT FOR MOBILE > Smart History: Auto-saves recent work, stored only on your device > Instant Paste: Smart clipboard detection > Quick Actions: One-tap copy, clear, share > Native Performance: Blazing fast, no loading screens > Light & Dark Modes: Beautiful design for any environment WHO IT'S FOR > Software engineers debugging away from a desk > Site reliability engineers checking cron schedules and certificates during an incident > Backend developers inspecting tokens and payloads > Engineering managers reviewing a diff or a config between meetings > Anyone who needs dev tools without a network PRICING Pro: $9.99/month or $39.99/year (save 67%) 3-day free trial. Cancel anytime. WHY DEVKIT > Works with no connection > Your work never leaves the device > Fast, native performance > Regular updates with new tools > No ads, ever > Built by a developer, for developers Download DevKit and take your tools anywhere. Terms of Use: Apple's Standard EULA (https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)
Screenshots
Verdict
The clearest difference is iOS requirement: Devil App Builder at 13.0 against DevKit's 15.1. On price, review sentiment, 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. Devil App Builder sells 2 in-app purchases, starting at $24.99 per year and DevKit sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Devil App Builder ships an update every 2 weeks, DevKit every 10 days. The most recent releases landed on October 8, 2026 and September 24, 2026 respectively.
| Parameter | Devil App Builder | DevKit |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 2 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 81 MB | 52 MB |
| Age rating | 9+ | 4+ |
| Developer | Mondayless Inc. | Alexander Herdt |
Customer experience
Devil App Builder
DevKit
In-app purchases
Devil App Builder
- Membership$24.991 Year
- A month$27.99
DevKit
- Pro Monthly3 Days trial$9.991 Month
- Pro Yearly3 Days trial$39.991 Year









