Top App Design Software for Prototyping

Between them, the 9 app design software on this page cover drag & drop (6), collaboration (6), testing management (5) and design templates (5). 9 of them have written a profile you can read before you get in touch.

1. 1

   

   Sketch

   Feature Library · Collaboration

   Sketch is a digital design tool made for interface and app designers.

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   Why #1: ISO 27001 · GDPR compliant, as stated on its own website, read 5 Oct 2026

   Not yet on record: client reviews, vetting.

2. =2

   

   Marvel

   Drag & Drop · Usability Testing · Software Prototyping

   Marvel is a collaborative design service that brings wireframes, prototypes, user tests and design specifications into one place.

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   Why #2 (shared): No major incidents in 90 days (status page)

   Not yet on record: client reviews, vetting.

3. =2

   

   AppsBuilder

   Testing Management · Design Templates · Visual Interface

   AppsBuilder is a no-code mobile app builder aimed at marketers and small businesses that want an app without hiring developers.

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   Why #2 (shared): ISO 27001, SOC 2 Type II, as stated on its own website, read 5 Oct 2026

   Not yet on record: client reviews, vetting.

4. 4

   

   Skuid

   Forms Creation & Design · Drag & Drop · Web App Development

   Skuid began as a front-end platform for building custom business applications with little or no code, and it now sits within Nintex under the name Nintex Apps.

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   Why #4: Launched 2013, as stated on its own website, read 5 Oct 2026

   Not yet on record: client reviews, vetting.

5. Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
6. –

   

   Flinto for Mac

   Drag & Drop · Testing Management · Usability Testing

   Flinto for Mac is a desktop tool that designers use to turn app screens into interactive, animated prototypes.

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7. –

   

   Open as App

   Forms Creation & Design · Drag & Drop · Web App Development

   Open as App is a no-code platform made in Germany. It automatically creates apps from existing data, so people do not need to write code.

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8. –

   

   Ultradox

   Drag & Drop · Web App Development · Testing Management

   Ultradox helps people automate routine tasks and build simple business apps, with or without programming skills. It works alongside Google Drive and was created by Floreysoft.

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9. –

   

   UXPin

   Feature Library · Usability Testing · Collaboration

   UXPin is a browser and desktop design tool where interface designers build prototypes from the same code components that developers use.

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10. –

    

    Instant Apps

    Drag & Drop · Testing Management · Design Templates

    Instant Apps is a no-code platform for building mobile apps for iOS and Android entirely online.

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Latest insights

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25 Oct 2026 · TrustList Editorial

Moonshot to retire its Kimi K2 API models by the end of December

From 31 October new sign-ups lose access to kimi-k2.6 and kimi-k2.7-code; existing API users keep them until a retirement Moonshot plans…

Latin America

25 Oct 2026 · TrustList Editorial

Latin America: funding calls and deadlines closing soon (week of 26 October 2026)

Grants, co-funding and credit for technology companies from Brazil's FINEP and state foundations, Colombia's Minciencias, Uruguay's ANII,…

Middle East

25 Oct 2026 · TrustList Editorial

Middle East and Africa: funding calls and deadlines closing soon (week of 26 October 2026)

Start-up programmes, grants and development funding for technology companies in the UAE, Qatar, South Africa and Tunisia, from a Doha…