Developer Laboratory vs Tester
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Developer Laboratory
This app provides a collection of example code and UI components for iOS developers. It demonstrates various functionalities like app icon creation, image viewing, web page loading, and custom controls. Access the source code to learn implementation details.
- APP icon creation
- Imitation of WeChat Moments
- Web page loading
- Custom UI components
- QR code scanning
- Facial tracking
- Database operations
Read full descriptionHide full description
iOS Technical Sharing (APP icon creation, imitation of WeChat Moments, imitation of WeChat image viewer, preventing @mentions on Sina Weibo, imitation of Alipay password prompt, imitation of Post Circle, tags, JS interaction + WK, loading web pages, adaptive cell height, embedding video player in TableView to prevent lag, custom beautiful popups, address selection, time selection, color selection, custom navigation control, carousel, QR code scanning, facial tracking, custom camera, ID card photo capture, iOS media player, AVPlayer encapsulation, dropdown selection popup, Snake game, marquee, adaptive height for TableView, native image download caching, folder operations, database operations, third-party login, sharing, payment, Apple installation agreement, data transfer between apps, acknowledgments for support) https://github.com/HansenCCC/YPLaboratory YPLaboratory is the source code for this project. If you want to see how it's implemented, you can click to view the source code. https://github.com/HansenCCC/YPUIKit-ObjC YPUIKit-ObjC is the framework for this project, providing many out-of-the-box functionalities. It includes in-app purchases, subscriptions, prompt dialogs, app info, user agent retrieval, device info, unique identifiers (persistent even after deletion), badges, useful buttons, common categories, MD5, hooks, regular expressions, hashed colors, image matrices, black-and-white images, base64 images, navigation settings, handy input fields, file management, floating draggable buttons, single-line input, multi-line input, loading dialogs, custom dialogs, local logs, marquee, waterfall flow, carousel, image preview, and more.
Tester
Test various APIs directly from your mobile device. Supports REST, GraphQL, WebSockets, and more, with advanced editors and request customization. Share requests easily and manage cookies and history.
- Test REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS APIs
- Powerful GraphQL editor with query, mutation, subscription support
- WebSocket testing tool for WS and WSS connections
- Flexible request data encoding and transfer types
- Import requests from curl, links, or files (Swagger, OpenAPI, Postman)
- One-tap request sharing via deep link or cURL command
- Apple Watch app for sending requests from your wrist
Read full descriptionHide full description
The first mobile app to handle any developer task on the go. Main features: - REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS, etc. - All types of HTTP requests: GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS, COPY, LINK, UNLINK, PURGE, LOCK, UNLOCK, PROPFIND, VIEW. - Powerful GraphQL editor with full-scale experience: body editor with Queries, Mutations, Subscriptions and syntax support; variables editor; documentation explorer; request settings and metadata. - WebSocket testing tool. Handles connection and message exchange via WS or WSS. - API calls with any kind of request data encoding and transfer type (query params, URLEncoded params, FormData, raw data, send files from device storage, cloud, remote server). - Settings. TLS can be skipped, redirects can be disabled, timeouts are adjustable. Weak SSL verification can be enabled and replaced with self-signed certificate. - Import request or collection by curl, link or file from your device. And naturally, there is any type of collection for you: Swagger, OpenAPI, Postman, YAML. - Need to share request in seconds? Deep link and cURL command supported. - Apple Watch app. Allows to send API requests directly from your wrist. - Integrations: Shortcuts, Widgets. Additional little things: - Autocomplete for most common headers keys. - Syntax highlighting; Auto formatting. - Optimized for viewing on any device screen. - Cookies. Collect, edit, create. - Request metrics. Measure request duration, response size, status code changing. - History of all request calls. - Request authorisation. Basic Auth with password and username. OAuth with header or query access token. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://tester.io/privacy-policy
Screenshots
Verdict
The clearest difference is price: Tester at Free against Developer Laboratory's $0.99. Tester also leads on update cadence (every 2 days vs monthly) and review sentiment (90% vs 60%). Developer Laboratory's advantage is iOS requirement (12.0 vs 15.1). On rating, ads, in-app purchases and monetization model 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
Tester is free to download; Developer Laboratory costs $0.99 up front. Developer Laboratory sells 8 one-off in-app purchases and Tester sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Developer Laboratory against 4.7 for Tester. That said, the two scores are not equally well evidenced: Tester has 574 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 60% of Developer Laboratory's written reviews are positive against 90% of Tester's.
Developer Laboratory ships an update monthly, Tester every 2 days. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.
| Parameter | Developer Laboratory | Tester |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (6 ratings) | 4.7 (574 ratings) — better |
| Positive reviews | 60.0% of reviews | 89.8% of reviews — better |
| Number of ratings | 6 | 574 — better |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 9 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | 恒盛 程 | FJEDI |
Customer experience
Developer Laboratory
Tester
Bugs and requests
Developer Laboratory
Not enough reviews yet to summarise bugs or requests.
Tester
Reported bugs
3 issues- Deleting all saved requests after updates
- App launching to a black screen
- Shortcuts integration not working as expected
Requested features
5 requests- Add support for environment variables
- Implement folders/collections management
- Allow exporting/importing data as JSON
- Provide more Shortcuts actions
- Add ability to change app icon
In-app purchases
Developer Laboratory
- 0 ice cola$0.99
- 1 ice cola$0.99
- A sip of iced cola$0.99
Show 5 moreShow fewer
- 一元商品$0.99
- 2 ice cola$1.99
- 3 ice cola$2.99
- 4.16 ice cola$3.99
- 16.5 ice cola$14.99
Tester
- Tester Plus Monthly$4.991 Month
- Tester Plus Yearly$24.991 Year
- Tester Plus Lifetime$79.99
Questions
Is Developer Laboratory free?
Is Tester free?
Which has better reviews, Developer Laboratory or Tester?
Do Developer Laboratory or Tester have ads?
Which is updated more often, Developer Laboratory or Tester?
Other comparisons















