Comparison

Tester vs Simple Sequence Diagram AI

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

Head to head
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

About

Simple Sequence Diagram AI

Features
Read full description

This app allows you to easily create sequence diagrams. Simply describe what you want to visualize, and the latest AI technology will automatically generate a sequence diagram for you. Visualizing information with sequence diagrams is useful for organizing complex processes and interactions. It helps stakeholders understand how systems and processes work, making sequence diagrams valuable in a wide range of situations. However, creating them manually can take time. With this app, you can create sequence diagrams quickly and efficiently. Even if you only provide a rough description of the sequence you want to create, the app can generate a diagram for you. You can also provide more detailed instructions and make adjustments as needed. It can be used in various situations such as: - Visualizing API communication flows in software development - Managing flows from user registration and authentication to service usage - Organizing data transmission and response processes in web services - Managing and visualizing customer support inquiry flows - Designing email and notification system workflows - Visualizing interactions between microservices - Organizing complex approval workflows in business processes - Visualizing user interaction flows in e-commerce systems - Visualizing the process from ordering to delivery in supply chains Please try it whenever you need to create a sequence diagram. [Features] - Intuitive operation Ease of use is important. The app runs smoothly and allows you to edit sequence diagrams intuitively. - Ready to use You can start using the app immediately without creating an account. - Cloud storage support Use cloud storage to save and edit your sequence diagram data across multiple devices. - Export and Share Export and share your sequence diagrams, or use the exported data in other environments. - Import Import exported sequence diagram files and continue editing them. - Text-based editing Edit your sequence diagrams directly using Mermaid notation. - Dark theme support The app supports a dark theme, making it comfortable to use even in low-light environments.

Screenshots

Tester4 screens
Simple Sequence Diagram AI4 screens

Verdict

The call

The clearest difference is update cadence: Tester at every 2 days against Simple Sequence Diagram AI's every 2 weeks. Tester also leads on chart position (#163 vs unranked). Simple Sequence Diagram AI's advantage is iOS requirement (15.6 vs 18.7). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Tester sells 7 in-app purchases, starting at $0.99 per 7 days and Simple Sequence Diagram AI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Tester ships an update every 2 days, Simple Sequence Diagram AI every 2 weeks. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 8 level
Tester versus Simple Sequence Diagram AI: the parameters behind the verdict, then further details
ParameterTesterSimple Sequence Diagram AI
PriceFreeFree
Rating4.7 (584 ratings) — better—
Positive reviews89.9% of reviews—
Number of ratings584 — better—
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
Best chart rank#163 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.715.6 — better
Further details — not scored
Size76 MB55 MB
Age rating4+4+
DeveloperFJEDIYUKI TANAIKE

Bugs and 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

Simple Sequence Diagram AI

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Tester

Subscriptions6
  • Tester Go Weekly$0.997 Days
  • Tester Go Monthly$4.991 Month
  • Tester Plus Monthly$7.991 Month
Show 3 more
  • Tester Pro Monthly$19.991 Month
  • Tester Plus Yearly$79.991 Year
  • Tester Pro Yearly$200.001 Year
One-time1
  • Tester Plus Lifetime$89.99
2 purchases

Simple Sequence Diagram AI

Subscriptions2
  • Simple Sequence Flow Pro (Monthly)$4.991 Month
  • Simple Sequence Flow Pro (Annual)$44.991 Year

Questions

Is Tester free?
Tester is free to download, with in-app purchases available.
Is Simple Sequence Diagram AI free?
Simple Sequence Diagram AI is free to download, with in-app purchases available.
Do Tester or Simple Sequence Diagram AI have ads?
Neither Tester nor Simple Sequence Diagram AI shows ads.
Which is updated more often, Tester or Simple Sequence Diagram AI?
Tester ships an update every 2 days, and Simple Sequence Diagram AI every 2 weeks. Most recently, Tester was updated on October 21, 2026 and Simple Sequence Diagram AI on October 12, 2026.

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