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.
JSON, JWT & Dev Tools
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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 โข JSON โ pretty-print, minify and validate, with the exact offset of a parse error โข JWT โ decode header and payload, see exp / iat / nbf and whether the token is already expired โข Base64 & URL โ encode or decode, direction detected automatically, base64url supported โข Unix timestamp โ epoch to date and back, seconds and milliseconds detected, full timezone list โข UUID โ generate v4 or v7, up to 100 at once โข Hash โ MD5, SHA-1, SHA-256 and SHA-512 in a single pass โข Color โ HEX, RGB and HSL, with ready-to-paste Flutter, SwiftUI and Compose code โข Text diff โ line-by-line comparison of two versions WORKS WHERE YOU WORK โข 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/
Screen Specs
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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 โข Device โ 95 entries, every iPhone from the original to iPhone 17, plus iPad, Apple Watch, Mac and desktop displays โข Social โ 44 placements across Instagram, TikTok, YouTube, X, LinkedIn, Threads, Snapchat, Discord, Twitch, Reddit, WhatsApp, Facebook and Pinterest โข Ads โ 22 specs, current App Store screenshot requirements plus the standard display ad units โข Print โ 21 stocks, ISO A and B series, US Letter through Tabloid, business cards, every one at 300 DPI โข 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 โข Aspect ratio lock โ set a ratio, change one side, the other follows โข DPI calculator โ real pixel density from any diagonal โข Side-by-side compare โ two resolutions, pixel counts, megapixels โข Favorites, and your own custom sizes โข 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
Verdict
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
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.
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.
| Parameter | JSON, JWT & Dev Tools | Screen Specs |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 5 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details โ not scored | ||
| Size | 38 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Petrichka Yaroslav | Burak Kose |
In-app purchases
JSON, JWT & Dev Tools
No in-app purchases
Screen Specs
- Weekly Subscription$2.997 Days
- Yearly Subscription$14.991 Year
- Lifetime Access$29.99
Questions
Is JSON, JWT & Dev Tools free?
Is Screen Specs free?
Do JSON, JWT & Dev Tools or Screen Specs have ads?
Which is updated more often, JSON, JWT & Dev Tools or Screen Specs?
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