Comparison

Power Apps Mobile Preview vs JSON, JWT & Dev Tools

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

Head to head
About

Power Apps Mobile Preview

Features
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Test your in-development Power Apps mobile experiences on a real device β€” no rebuild, no resign, no store submission. Power Apps Mobile Preview app is a developer companion app for the new React Native–based Power Apps mobile runtime: scan a QR code from your local Metro bundler (or paste a dev URL) and your app loads instantly on your phone or tablet, exactly the way it will run in production. Think of it as the Power Apps equivalent of a dev sandbox. Built for makers and engineers iterating on the next generation of Power Apps mobile. WHAT'S INSIDE Power Apps Mobile Preview is a thin host that loads your in-progress app bundles over the wire so you can see code, layout, and data changes in seconds. β€’ Scan-to-load: Point the in-app scanner at the QR code printed by your local Metro / Expo dev server and the JS bundle streams onto the device. β€’ Manual URL entry: Type or paste any reachable dev-server URL (e.g., http://192.168.1.20:8081) when QR scanning isn't an option β€” tunnels, remote machines, restricted networks. β€’ Fast Refresh: Save a file in your editor and watch the change appear on device, with component state preserved where possible. β€’ Native module parity: Bundled with the same native modules the production Power Apps client ships β€” auth, connectors, file system, camera, location, secure storage, telemetry β€” so what you test is what your users will get. β€’ Sign-in with your work or school account: Authenticate once with Microsoft Entra and your dev apps can call Dataverse, Microsoft Graph, and custom connectors with real tokens. β€’ Recent connections list: Quickly re-open previously loaded dev URLs without re-scanning. β€’ Diagnostic overlay: Surface bundle URL, runtime version, JS errors, and red-box stacks for fast triage. WHO IT'S FOR β€’ Makers previewing custom React Native components and pages before publishing. β€’ ISVs and partners building native extensions against the Power Apps mobile runtime. β€’ Engineers on the Power Apps platform team validating SDK and connector changes end-to-end on real hardware. TIPS β€’ Make sure your phone and dev machine are on the same Wi-Fi network β€” if they aren't, use a tunnel (e.g., expo start --tunnel) and paste the public URL. β€’ Shake the device (or use the menu) to reload the bundle, toggle the element inspector, or open the dev menu. β€’ Long-press a recent connection to remove it from the list. β€’ Mobile Preview app is for development only. You will need to package and distribute your own production apps to App Store or enterprise distribution channel. DISCLAIMER This is a developer only release intended for development and evaluation. APIs, behaviors, and supported native modules may change before general availability. Do not rely on Mobile Preview app for production workloads. Accessibility: https://go.microsoft.com/fwlink/?linkid=2121429

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 β€” 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 β€” JSON, JWT, timestamp, Base64, color, URL β€” and opens the right tool with the result already on screen. No menu diving, no picking the format yourself. EIGHT TOOLS β€’ JSON β€” pretty-print, minify and validate, with the exact offset of a parse error β€’ JWT β€” decode header and payload, see exp / iat / nbf and whether the token is already expired β€’ Base64 & URL β€” encode or decode, direction detected automatically, base64url supported β€’ Unix timestamp β€” epoch to date and back, seconds and milliseconds detected, full timezone list β€’ UUID β€” generate v4 or v7, up to 100 at once β€’ Hash β€” MD5, SHA-1, SHA-256 and SHA-512 in a single pass β€’ Color β€” HEX, RGB and HSL, with ready-to-paste Flutter, SwiftUI and Compose code β€’ Text diff β€” line-by-line comparison of two versions WORKS WHERE YOU WORK β€’ Share extension β€” 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 β€” 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

Power Apps Mobile Preview4 screens
JSON, JWT & Dev Tools3 screens

Verdict

The call

The clearest difference is update cadence: JSON, JWT & Dev Tools at weekly against Power Apps Mobile Preview's monthly. Power Apps Mobile Preview's advantage is chart position (#167 vs unranked). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

Power Apps Mobile Preview ships an update monthly, JSON, JWT & Dev Tools weekly. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

Scorecard2 real differences Β· 5 level
Power Apps Mobile Preview versus JSON, JWT & Dev Tools: the parameters behind the verdict, then further details
ParameterPower Apps Mobile PreviewJSON, JWT & Dev Tools
PriceFreeFree
Update frequencyMonthlyWeekly β€” better
AdsNoNo
In-app purchasesNoNo
Best chart rank#167 β€” betterβ€”
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 β€” better
Further details β€” not scored
Size57 MB38 MB
Age rating4+4+
DeveloperMicrosoft CorporationPetrichka Yaroslav

In-app purchases

None

Power Apps Mobile Preview

No in-app purchases

None

JSON, JWT & Dev Tools

No in-app purchases

Questions

Is Power Apps Mobile Preview free?
Power Apps Mobile Preview 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 Power Apps Mobile Preview or JSON, JWT & Dev Tools have ads?
Neither Power Apps Mobile Preview nor JSON, JWT & Dev Tools shows ads.
Which is updated more often, Power Apps Mobile Preview or JSON, JWT & Dev Tools?
Power Apps Mobile Preview ships an update monthly, and JSON, JWT & Dev Tools weekly. Most recently, Power Apps Mobile Preview was updated on October 6, 2026 and JSON, JWT & Dev Tools on October 4, 2026.

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