Comparison

Developer Laboratory vs Tester

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

Head to head
About

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.

Highlights
  • APP icon creation
  • Imitation of WeChat Moments
  • Web page loading
  • Custom UI components
  • QR code scanning
  • Facial tracking
  • Database operations
Features
Read 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.

About

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.

Highlights
  • 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
Features
Read 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

Developer Laboratory3 screens
Tester4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Developer Laboratory ships an update monthly, Tester every 2 days. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

Scorecard5 real differences · 5 level
Developer Laboratory versus Tester: the parameters behind the verdict, then further details
ParameterDeveloper LaboratoryTester
Price$0.99Free — better
Rating4.7 (6 ratings)4.7 (574 ratings) — better
Positive reviews60.0% of reviews89.8% of reviews — better
Number of ratings6574 — better
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS12.0 — better15.1
Further details — not scored
Size9 MB76 MB
Age rating4+4+
Developer恒盛 程FJEDI

Customer experience

Developer Laboratory

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews5 reviews
Positive60.0%
Neutral40.0%
Negative0.0%

Tester

All ratings574 ratings
Positive92.7%
Neutral2.8%
Negative4.5%
Written reviews324 reviews
Positive89.8%
Neutral4.0%
Negative6.2%

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

8 purchases

Developer Laboratory

One-time8
  • 0 ice cola$0.99
  • 1 ice cola$0.99
  • A sip of iced cola$0.99
Show 5 more
  • 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
3 purchases

Tester

Subscriptions2
  • Tester Plus Monthly$4.991 Month
  • Tester Plus Yearly$24.991 Year
One-time1
  • Tester Plus Lifetime$79.99

Questions

Is Developer Laboratory free?
Developer Laboratory costs $0.99, and also offers in-app purchases.
Is Tester free?
Tester is free to download, with in-app purchases available.
Which has better reviews, Developer Laboratory or Tester?
Tester is rated higher. Developer Laboratory averages 4.7 out of 5 from 6 ratings, while Tester averages 4.7 from 574 ratings.
Do Developer Laboratory or Tester have ads?
Neither Developer Laboratory nor Tester shows ads.
Which is updated more often, Developer Laboratory or Tester?
Developer Laboratory ships an update monthly, and Tester every 2 days. Most recently, Developer Laboratory was updated on September 10, 2026 and Tester on September 22, 2026.

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