Comparison

JSON, JWT & Dev Tools vs Screen Specs

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

Head to head
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/

About

Screen Specs

Features
Read full description

Stop looking up pixel dimensions. 227 exact sizes โ€” every iPhone, iPad, Watch and Mac, Instagram, YouTube, App Store screenshots, A4 at 300 DPI. All offline. WHAT'S INSIDE โ€ข Device โ€” 95 entries, every iPhone from the original to iPhone 17, plus iPad, Apple Watch, Mac and desktop displays โ€ข Social โ€” 44 placements across Instagram, TikTok, YouTube, X, LinkedIn, Threads, Snapchat, Discord, Twitch, Reddit, WhatsApp, Facebook and Pinterest โ€ข Ads โ€” 22 specs, current App Store screenshot requirements plus the standard display ad units โ€ข Print โ€” 21 stocks, ISO A and B series, US Letter through Tabloid, business cards, every one at 300 DPI โ€ข Video โ€” 11 standards, SD through 8K and DCI cinema THE SPECS THAT MATTER Points and pixels with the scale factor. Pixel density. Aspect ratio. And safe-area insets, top and bottom โ€” the numbers you actually need to lay out a screen, and the ones almost nobody publishes. TOOLS โ€ข Aspect ratio lock โ€” set a ratio, change one side, the other follows โ€ข DPI calculator โ€” real pixel density from any diagonal โ€ข Side-by-side compare โ€” two resolutions, pixel counts, megapixels โ€ข Favorites, and your own custom sizes โ€ข Export the whole catalog as JSON or CSV BUILT TO BE FAST No account. No network. No tracking. Everything is on device, so a size is two taps away whether or not you have signal. PREMIUM The full size database, search, the calculator and export are free. Premium unlocks side-by-side compare and unlimited custom sizes. Privacy Policy: https://burakkose.me/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

JSON, JWT & Dev Tools3 screens
Screen Specs4 screens

Verdict

The call

The clearest difference is in-app purchases: JSON, JWT & Dev Tools at none against Screen Specs's 3. On price, update cadence, ads 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. Screen Specs sells 3 in-app purchases, starting at $2.99 per 7 days. JSON, JWT & Dev Tools asks for nothing beyond the download.

UpkeepUpdate frequency

JSON, JWT & Dev Tools ships an update weekly, Screen Specs every 5 days. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

Scorecard1 real difference ยท 5 level
JSON, JWT & Dev Tools versus Screen Specs: the parameters behind the verdict, then further details
ParameterJSON, JWT & Dev ToolsScreen Specs
PriceFreeFree
Update frequencyWeeklyEvery 5 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPod
Requires iOS15.015.0
Further details โ€” not scored
Size38 MB9 MB
Age rating4+4+
DeveloperPetrichka YaroslavBurak Kose

In-app purchases

None

JSON, JWT & Dev Tools

No in-app purchases

3 purchases

Screen Specs

Subscriptions2
  • Weekly Subscription$2.997 Days
  • Yearly Subscription$14.991 Year
One-time1
  • Lifetime Access$29.99

Questions

Is JSON, JWT & Dev Tools free?
JSON, JWT & Dev Tools is free to download, with no in-app purchases.
Is Screen Specs free?
Screen Specs is free to download, with in-app purchases available.
Do JSON, JWT & Dev Tools or Screen Specs have ads?
Neither JSON, JWT & Dev Tools nor Screen Specs shows ads.
Which is updated more often, JSON, JWT & Dev Tools or Screen Specs?
JSON, JWT & Dev Tools ships an update weekly, and Screen Specs every 5 days. Most recently, JSON, JWT & Dev Tools was updated on October 21, 2026 and Screen Specs on October 13, 2026.

Other comparisons