Comparison

REPL vs JSON, JWT & Dev Tools

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

Head to head
About

REPL

Features
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REPL is a native code runner for Python and JavaScript โ€” built for the AI era. When your favorite AI gives you code, where do you test it? REPL lets you paste code directly from AI conversations, run it instantly, and copy the results back. No laptop required. FEATURES - Native Python 3.11 โ€” Real CPython running locally on your device, not a web interpreter - JavaScript Engine โ€” Powered by iOS JavaScriptCore - Persistent State โ€” Variables survive between runs, like a true REPL - Share Sheet โ€” Send code from any app directly to REPL - History โ€” Access your last 50 code runs - Smart Parsing โ€” Automatically extracts code from markdown fences - Offline โ€” Everything runs locally, no internet needed - Dark Mode โ€” Easy on the eyes BUILT FOR AI WORKFLOWS Copy code from ChatGPT, Claude, Gemini, or any AI assistant. Paste into REPL. Tap Run. See results. Copy output back to your conversation. Iterate faster than ever. TECHNICAL DETAILS Python: Full CPython 3.11 interpreter embedded natively JavaScript: Apple's JavaScriptCore engine Storage: Code history saved locally Privacy: No data leaves your device

About

JSON, JWT & Dev Tools

Features
Read full description

Your clipboard, decoded. You're away from your laptop and a JWT shows up in an alert log. A JSON blob lands in Slack. A config diff needs checking. The usual answer is some website full of ads โ€” which means pasting a production token into a stranger's server. Declip does all of it on your device. No account. No sign-in. PASTE & DETECT One tap. Declip reads the clipboard, works out what it's looking at โ€” JSON, JWT, timestamp, Base64, color, URL โ€” and opens the right tool with the result already on screen. No menu diving, no picking the format yourself. EIGHT TOOLS โ€ข JSON โ€” pretty-print, minify and validate, with the exact offset of a parse error โ€ข JWT โ€” decode header and payload, see exp / iat / nbf and whether the token is already expired โ€ข Base64 & URL โ€” encode or decode, direction detected automatically, base64url supported โ€ข Unix timestamp โ€” epoch to date and back, seconds and milliseconds detected, full timezone list โ€ข UUID โ€” generate v4 or v7, up to 100 at once โ€ข Hash โ€” MD5, SHA-1, SHA-256 and SHA-512 in a single pass โ€ข Color โ€” HEX, RGB and HSL, with ready-to-paste Flutter, SwiftUI and Compose code โ€ข Text diff โ€” line-by-line comparison of two versions WORKS WHERE YOU WORK โ€ข Share extension โ€” select text in any app, hit Share, pick Declip. It parses right inside the sheet; no app switch needed. PRIVATE, ACTUALLY Every tool runs entirely on device. Tool input and output never leave your phone โ€” there is no server to send them to. The clipboard is only ever read when you tap to read it, never in the background. No advertising identifier, no tracking prompt, no account linkage. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

REPL3 screens
JSON, JWT & Dev Tools3 screens

Verdict

The call

The clearest difference is iOS requirement: JSON, JWT & Dev Tools at 15.0 against REPL's 17.6. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

Scorecard1 real difference ยท 5 level
REPL versus JSON, JWT & Dev Tools: the parameters behind the verdict, then further details
ParameterREPLJSON, JWT & Dev Tools
PriceFreeFree
Update frequencyโ€”Weekly
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.615.0 โ€” better
Further details โ€” not scored
Size22 MB38 MB
Age rating4+4+
DeveloperJesus SoledadPetrichka Yaroslav

In-app purchases

None

REPL

No in-app purchases

None

JSON, JWT & Dev Tools

No in-app purchases

Questions

Is REPL free?
REPL is free to download, with no in-app purchases.
Is JSON, JWT & Dev Tools free?
JSON, JWT & Dev Tools is free to download, with no in-app purchases.
Do REPL or JSON, JWT & Dev Tools have ads?
Neither REPL nor JSON, JWT & Dev Tools shows ads.

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