Adaptivity (B) vs Kotlin Recipes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Adaptivity (B)
Visualize how app layouts appear on various devices and adapt to different settings like orientation, multitasking, and text size changes. This free version offers essential tools for developers and designers to preview their work.
- Visualize layout sizes
- Display sizes in points or pixels
- Toggle status bar visibility
- Support for iPad multitasking
- Dark appearance support
- Force right-to-left layout
- Handoff actions
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Adaptivity is an invaluable tool for developers and designers. Use it to visualize how Size Classes and margins for layout, readable content and the safe area look on real devices and how they change with respect to orientation, iPad multitasking and Dynamic Type size changes. This free version has reduced features. TESTIMONIALS • “Adaptivity is not just highly recommended – it’s essential” — Paul Hudson, Hacking With Swift article “8 essential apps for iOS developers”, 30th March 2020. • “It's a very, very good tool as a reference for both developers and designers” — Gui Rambo, Stacktrace podcast episode #77, 1st April 2020. • “I'm not trying to spend your money, but to me this is a no-brainer” — Sean Allen YouTube video “Indie Dev Apps”, 12th April 2020. MAIN FEATURES • Visualize sizes for full view, layout margins, readable content guide and safe area layout guide. • Sizes displayed in points or pixels. • Regular or large navigation bar titles. • Toggle status bar and navigation bar/toolbar/tab bar visibility. • Activity View Controller for sharing a snapshot image of each view. • iPad multitasking (see note). • Dark appearance support (requires iOS/iPadOS 13 or later). • Setting to force right-to-left layout. • Handoff actions from Adaptivity (B) on one device to Adaptivity (A) on another. OTHER VIEWS • Popover, Form/Page Sheet, Full Screen and Automatic modal presentations. • Customise Sheet Presentations on iOS/iPadOS 15 or later. • Tab Bar Controller • Class style Split View Controller. • Dynamic Type styles for the current Content Size Category. The full version of the app, Adaptivity (A), includes many more features: • Table View Controller. • Double and triple column style Split View Controllers (requires iOS/iPadOS 14 or later). • Keyboard Dodging and Custom Keyboard. • Safe Area Layout Guide. • Explore Pointer Interactions (requires iPadOS 13.4 or later and a trackpad or mouse). • Explore System Colors. • Explore System Fonts. • Explore System Images (requires iOS/iPadOS 13 or later). Choose which SF Symbols data set to view, configure rendering modes and much more. • Explore System Materials (requires iOS/iPadOS 13 or later). • Keyboard shortcuts. • Keyboard navigation (requires iPadOS 15 or later). • Home Screen Quick Actions (requires iOS/iPadOS 13 or later). • Siri shortcut with custom response UI. • Handoff support. • External display support. • Pre- and post-iOS 14 style Widgets to show layout. • iOS 14 style Widgets to show random System Images. • iOS 14 style Widgets to show Dynamic Type text styles. • iOS 16 lock screen Widgets to show layout. • iOS 16 lock screen Widgets to show random System Images. • Notification Content Extension. • Watch App. • iMessage App. Note: Adaptivity (A) supports multiple windows on iPadOS 13 or later. On earlier iOS versions, Adaptivity (A) and (B) must be downloaded to run Adaptivity twice using iPad multitasking. Adaptivity (A) is a universal purchase and includes a Mac Catalyst version of the app. Buying one allows the other to be downloaded at no extra cost using the same Apple ID. Adaptivity (C) has the same reduced features as Adaptivity (B) but only supports iPhone. Use it to visualize how an iPhone‑only app appears on iPad. For more information see https://hacknicity.com/adaptivity
Kotlin Recipes
This app provides runnable Kotlin code examples and SQL queries for developers. It offers a cheat sheet for common syntax needs, covering various language features and database operations. Users can edit and run code directly within the app, with offline access for most features.
- Runnable Kotlin code examples
- SQL query examples
- Code editor and runner
- Offline reference
- Searchable code snippets
- Kotlin 2.0 changes
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Tap Run and the real output appears right under the code, so you know what it does before it goes into your project. No Kotlin to install, no IDE, no setup, no account. 390+ short examples, one task each. Over 95% run on Kotlin 2.4. You know what you need, but not the exact syntax: • How do I fall back to a default value when a variable is null? • How do I return two values from a function? • How do I merge two maps? Each has a working example here. • 24 sections, including strings and dates, collections, nullable types, classes and interfaces, enums, generics, extension functions, lambdas, exception handling, regular expressions, multithreading, files, JSON and XML, algorithms, and design patterns. • What changed from Kotlin 1.4 to 2.0, with before-and-after code: value classes, sealed interfaces, data objects and the improved smart casts in Kotlin 2.0. • Reference, 320+ entries: keywords and standard library functions for strings, collections, files, and coroutines. Tap a word in the code to look it up. • 200+ SQL queries: JOIN, GROUP BY, subqueries, window functions; more than half run on a practice database. • Search looks inside the code: type joinToString to find every example that uses it. • Edit an example and run your version, or write your own. • Works on iPhone, iPad, and Mac. • Everything except running code works offline. Free version: 210+ Kotlin examples and 120+ SQL queries, the full reference, and 12 runs and 12 edits a day (Kotlin and SQL runs share one limit). Full version: all examples and queries, unlimited edits and examples of your own, and up to 30 Kotlin and 80 SQL runs a day. One-time purchase, no subscription. Built by a developer for developers. The project behind it has been in active development since 2015.
Screenshots
Verdict
The clearest difference is rating: Adaptivity (B) at 5.0 against Kotlin Recipes's 4.5. Adaptivity (B) also leads on in-app purchases (none vs 5) and update cadence (every 2 months vs every 4 months). On price, review sentiment, ratings volume and ads 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. Kotlin Recipes sells 5 one-off in-app purchases. Adaptivity (B) asks for nothing beyond the download.
Adaptivity (B) holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Adaptivity (B) ships an update every 2 months, Kotlin Recipes every 4 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.
| Parameter | Adaptivity (B) | Kotlin Recipes |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (9 ratings) — better | 4.5 (8 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 9 — better | 8 |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 12 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Geoff Hackworth | Fedor Obraztsov |
Customer experience
Adaptivity (B)
Kotlin Recipes
In-app purchases
Adaptivity (B)
No in-app purchases
Kotlin Recipes
- Оperations with example$0.99
- Unlock the paid topics$0.99
- Kotlin Samples$0.99
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- SQL queries$0.99
- Full version$2.99
Questions
Is Adaptivity (B) free?
Is Kotlin Recipes free?
Which has better reviews, Adaptivity (B) or Kotlin Recipes?
Do Adaptivity (B) or Kotlin Recipes have ads?
Which is updated more often, Adaptivity (B) or Kotlin Recipes?
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