Developer vs Contrastly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Developer
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Developer Tools helps you test servers, API calls, clients, and more. For each GET/POST request, it displays the JSON response in a user-friendly viewer. The JSON viewer supports all common data types, including lists, dictionaries, integers, doubles, and strings. It also shows the path to each element, making it easier to implement paths programmatically. The app also allows you to host an HTTP server directly on your phone and provides the IP address for connection. This is especially useful when testing data sent to a server or when getting started with server integration. Additionally, the app lets you generate and save QR codes. If any issues arise, or if you’d like to request a new feature, feel free to send me an email directly from the app’s home page. Included tools: Sending GET/POST requests JSON viewer for responses QR code generator Hosting an HTTP server on your phone
Contrastly
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Contrastly helps UI designers and frontend developers check, fix, and document color contrast faster. Test foreground and background colors, pick colors directly from screenshots, generate AA/AAA-friendly alternatives, compare multiple options, and export professional WCAG reports. Built for real design and development workflows • Check color contrast instantly with WCAG-based evaluation. • Preview combinations in realistic UI, text, and icon contexts. • Pick foreground and background colors directly from screenshots or photos. • Fix color pairs to AA or AAA while keeping your chosen color locked. • Save checks, compare options, and export shareable PDF reports. Designed for • UI designers reviewing interfaces and design specs. • Frontend developers validating production colors. • Teams preparing accessibility handoff and client delivery materials. Pro features include • PDF accessibility report export. • Color picking from images and screenshots. • Fix to AA / AAA. • Compare mode. • Favorites and unlimited history. Privacy Policy: https://labs-time.web.app/Contrastly-privacy.html Terms of Use: https://labs-time.web.app/Contrastly-terms.html
Screenshots
Verdict
The clearest difference is in-app purchases: Developer at none against Contrastly's 2. Developer also leads on update cadence (daily vs every 3 weeks). Contrastly's advantage is iOS requirement (15.6 vs 18.0). On price, ads and device support 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. Contrastly sells 2 in-app purchases, starting at $6.99 per year. Developer asks for nothing beyond the download.
Developer ships an update daily, Contrastly every 3 weeks. Both last shipped on November 1, 2026.
| Parameter | Developer | Contrastly |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | Mannon Wallace | 帆 张 |
In-app purchases
Developer
No in-app purchases
Contrastly
- Unlock Pro (Yearly)$6.991 Year
- Unlimited Export (Lifetime)$17.99
