Tester vs Quack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
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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
Quack
This app provides a digital rubber duck to help you debug code. Explain your programming issues out loud or by typing, and the app processes your input locally for privacy. It works offline and requires no account, offering a judgment-free space to talk through problems.
- Digital rubber duck debugger
- Text or voice input
- Hands-free voice mode
- On-device processing
- No internet required
- No account needed
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Quack is a rubber duck debugger that lives in your pocket. The age-old trick works: explain your bug out loud, step by step, and the answer often appears before you finish talking. Quack gives you a friendly duck that listens — by text or hands-free voice — with zero judgment, no internet, and no account. WHY QUACK • Talk it out: type or speak your problem and walk through it line by line. • Voice mode: explain bugs hands-free while you keep your hands on the keyboard. • Private by design: your words are processed on your device — nothing is stored or sent to a server. • No account, no sign-up: open the app and start debugging in seconds. • Works offline: think on a plane, on the train, anywhere. Free to use, with an optional one-time purchase to remove ads.
Screenshots
Verdict
The clearest difference is rating: Tester at 4.7 against Quack's 4.0. Tester also leads on ads (none vs shown) and update cadence (every 2 days vs every 6 weeks). Quack's advantage is review sentiment (100% vs 90%) and iOS requirement (16.4 vs 18.7). On price, 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
Both are free to download. Tester sells 7 in-app purchases, starting at $0.99 per 7 days and Quack sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Tester holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Tester has 584 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 90% of Tester's written reviews are positive against 100% of Quack's, so the app with the better star average is not the one people write more warmly about.
Tester ships an update every 2 days, Quack every 6 weeks. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.
| Parameter | Tester | Quack |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (584 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 89.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 584 — better | 1 |
| Update frequency | Every 2 days — better | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | #148 — better | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 18.7 | 16.4 — better |
| Further details — not scored | ||
| Size | 76 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | FJEDI | BEK Service LTD |
Customer experience
Tester
Quack
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
Quack
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Tester
- Tester Go Weekly$0.997 Days
- Tester Go Monthly$4.991 Month
- Tester Plus Monthly$7.991 Month
Show 3 moreShow fewer
- Tester Pro Monthly$19.991 Month
- Tester Plus Yearly$79.991 Year
- Tester Pro Yearly$200.001 Year
- Tester Plus Lifetime$89.99
Quack
- Pirate Duck$0.99
- Dev Hoodie$0.99
- Cool Duck$0.99
Show 7 moreShow fewer
- Detective Duck$1.49
- Wizard Duck$1.49
- Astronaut Duck$1.49
- Study Buddy$1.99
- Decision Maker$1.99
- Interview Prep$2.49
- Remove Ads$2.99









