Software Alternatives & Startups
Register | Login

ExtendsClass JSON Generator VS ASO.dev

Compare ExtendsClass JSON Generator VS ASO.dev and see what are their differences

ExtendsClass JSON Generator

ExtendsClass's JSON generator allows to generate random JSON data from a template.

Rating
0 reviews
Pricing
Free Free trial
Alternatives Is it good?
ASO.dev

ASO.dev is an all-in-one platform for App Store optimization, offering keyword tracking, competitor insights, metadata editing, and analytics. It simplifies managing app performance, helping developers boost visibility and drive organic growth.

Rating
0 reviews
Pricing
Paid Free trial $25 / Monthly
Alternatives Is it good?
PDFGate
Generate, process, and sign documents with a single API. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, ASO.dev seems to be more popular. It has been mentioned 3 times since March 2021.

social mentions
0 vs 3
API Tools popularity
100% vs 0%
alternatives listed
3 vs 51

Base details

Website, pricing, platforms and company facts side by side.

ExtendsClass JSON Generator
ASO.dev
Website extendsclass.com aso.dev
Pricing
Free Free trial
Paid Free trial $25 / Monthly Official pricing
Platforms —
Windows Mac OSX iOS Android +1
Company 2019 Startup from the United Kingdom · 1 - 9 employees · 2022
Listed in
API Tools Testing JSON Random Generator +1
Competitor Analysis App Store Optimization (ASO) Mobile App Marketing App Reviews Analytics Metadata Management Mobile App Store Optimization Marketing Competitor Research Price Optimization Developer Tools Mobile Analytics +9

About ExtendsClass JSON Generator and ASO.dev

In their own words, as submitted to SaaSHub.

ExtendsClass JSON Generator
ASO.dev

This free online tool allows to generate JSON dataset. You can generate multiple JSON files exported to a zip archive. No limits. No registration.

Read more about ExtendsClass JSON Generator

Features: Smart Metadata Editor: Easily edit app titles, subtitles, and descriptions suggestions to ensure optimal content for search algorithms. Integration with GPT, Claude, DeepL, Google for translations by one click. Export to CSV, Fastlane and JSON. Unlimited Keywords Tracking &...

Read more about ASO.dev

Features and specs

What each product offers, as listed by its team.

ExtendsClass JSON Generator 4 features
ASO.dev 5 features
  • User-Friendly Interface
    The ExtendsClass JSON Generator features a clean and intuitive interface that is easy to navigate, even for beginners. Users can quickly understand how to generate JSON data without needing to read extensive documentation.
  • Customization Options
    The tool provides extensive customization options allowing users to specify data types, structures, and values. This flexibility ensures that the generated JSON meets specific project requirements.
  • Real-Time Preview
    Users can see a real-time preview of the JSON being generated, which helps in making immediate adjustments and ensures the output is as desired.
  • No Registration Required
    ExtendsClass JSON Generator can be used without the need for registration, allowing users to quickly generate JSON data without creating an account or logging in.

Possible disadvantages

  • Limited Advanced Features
    While the tool is robust for basic JSON generation, it lacks some advanced features that more experienced developers or larger projects might require, such as integration with APIs or automation capabilities.
  • Performance on Complex Structures
    The tool might experience performance issues or slowdowns when generating very large or highly complex JSON structures, which can be a drawback for users with such needs.
  • Internet Dependency
    Since it is a web-based tool, users need a stable internet connection to access and use the JSON Generator, which might not be feasible for all users at all times.
  • App Ads
    Explore detailed ad activity for any app on the App Store. Instantly view all active keywords, creatives, and Custom Product Pages (CPPs) tied to each campaign. Analyze which apps are buying which terms, and what visuals they use across all device types. Filter by country, compare strategies, and stay ahead of the competition with full visibility into Apple Search Ads.
  • Keywords Ads
    Find out exactly who’s advertising on any keyword in the App Store. Instantly see the apps bidding for that term, their ad creatives, and linked Custom Product Pages (CPPs). Explore ad visibility by country, and dive into visuals across device types. Perfect for uncovering competitors' strategies or spotting high-value keywords to target.
  • Competitors’ Keywords Ranking
    Hot Discover relevant keywords and compare your app's listing with competitors. Analyze keyword rankings across various countries and time periods, and monitor key metrics like Search Ads Popularity (SAP), difficulty, competing apps, and ranking trends. Enhance your app's visibility by leveraging competitors' successful strategies.
  • Subscription Pricing
    Optimize your app’s revenue. Manage prices in USD, choose rounded or charming price options, set fixed prices globally or apply multipliers like Netflix, Big Mac, and PPP (Purchasing Power Parity). Effortlessly edit prices in bulk with VAT adjustments, tailored for global markets by country tier.
  • Mass screenshot uploader
    Easily upload screenshots and videos individually or in bulk with simple folder selection - automatic device detection, perfect sizing, and correct order guaranteed!

Analysis

An editorial look at what each product does well and who it suits.

ExtendsClass JSON Generator
ASO.dev

No analysis of ExtendsClass JSON Generator yet.

Overall verdict

  • ASO.dev is a solid, developer-focused App Store Optimization tool that offers useful keyword research and app metadata analysis features, making it a helpful resource for indie developers and small teams looking to improve app visibility without a large budget.

Why this product is good

  • Provides keyword research and tracking tailored for app store optimization
  • Designed with developers and indie makers in mind, offering an accessible and practical interface
  • Helps analyze app metadata, titles, and descriptions to improve discoverability
  • Often more affordable or lightweight compared to enterprise-grade ASO platforms
  • Supports data-driven decisions for improving organic app downloads

Recommended for

  • Indie app developers looking to boost visibility
  • Small development teams with limited marketing budgets
  • Solo makers who want practical ASO insights without complexity
  • Developers focused on improving organic downloads for iOS and Android apps
  • Anyone new to App Store Optimization wanting an approachable tool

Videos

Walkthroughs and reviews on video.

ExtendsClass JSON Generator 0 videos + Add
ASO.dev 3 videos + Add

No ExtendsClass JSON Generator videos yet. You could help us improve this page by suggesting one.

How to Find the Best App Store Keywords in Minutes

More videos

  • - Screenshots Mass Uploader
  • - How to Quickly Design and Localize App Store Screenshots in Figma for 39 Languages with ASO.dev

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
ExtendsClass JSON Generator
ASO.dev
100% 100%
API Tools
0% 0%
0% 0%
App Store Optimization (ASO)
100% 100%
100% 100%
Testing
0% 0%
0% 0%
Analytics
100% 100%

Questions & Answers

As answered by people managing ExtendsClass JSON Generator and ASO.dev.

What makes your product unique?

ASO.dev's answer:

ASO Toolkit with NO limits on keywords or apps made by developers for developers

How would you describe the primary audience of your product?

ASO.dev's answer:

We build ASO.dev for everyone who manages apps on the App Store - from independent developers to major mobile publishers. Whether you run a single app or a whole portfolio, we help you automate the repetitive work and focus on what really drives growth.

Why should a person choose your product over its competitors?

ASO.dev's answer:

ASO.dev gives you complete freedom - no limits, no restrictions. You can track unlimited keywords, apps, and developer accounts. All the keywords your apps rank for are automatically collected into a single, unified list - you don’t need to search or guess which ones matter.

Our automation tools handle repetitive App Store Connect tasks like metadata editing, bulk uploads, translations, and screenshots - saving hours every week for developers and marketing teams. Unlike most tools, ASO.dev combines keyword tracking, metadata management, reviews, and Apple Search Ads insights in a single dashboard, designed for both indie developers and large publishers.

In short: ASO.dev saves time, removes limits, and gives you full control over your App Store growth.

What's the story behind your product?

ASO.dev's answer:

ASO.dev was born from our own experience and frustration. After translating our app into 39 languages, we got tired of manually filling out What’s New, managing screenshots, and guessing which keywords users were searching for. We wanted a tool that would simply show all the keywords our app ranked for - and automate everything else.

So we built it ourselves. What started as a small tool quickly grew into a full platform - designed, coded, and scaled entirely by two people, bootstrapped from day one.

Today, ASO.dev helps developers and companies of all sizes save time, automate App Store workflows, and focus on growth instead of routine.

Built from our own pain, grown by passion - and still 100% bootstrapped.

Which are the primary technologies used for building your product?

ASO.dev's answer:

  • Flutter (multi-platform: macOS, Windows, iOS, Andoid)
  • .NET Core (C#) for API services and integrations
  • MongoDB for app data and user state
  • RabbitMQ for distributed task processing and queue management
  • Kubernetes
  • Rancher
  • Hosted on Hetzner
  • Data backups stored on S3-compatible storage
  • Apple App Store Connect API (metadata, screenshots, in-app events, pricing, etc.)
  • Stripe & RevenueCat for subscription management

User comments

Share your experience with using ExtendsClass JSON Generator and ASO.dev. For example, how are they different and which one is better?

Log in or Post with

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

ExtendsClass JSON Generator 0 mentions
ASO.dev 3 mentions

Tracking ExtendsClass JSON Generator since Mar 2021.

  • Big news for teams working on App Store screenshots!
    Just drag and drop the folder exported from Figma - with all localized screenshots inside - and ASO.dev takes care of the rest. - Source: dev.to / 10 months ago
  • How We Launched on ProductHunt Twice: Insights and Lessons
    P.S.: If you need to work with App Store Connect or organic growth (like SEO but for iOS), try our product ASO.dev 👍. - Source: dev.to / almost 2 years ago
  • SEO from a Newbie for Beginners
    { tag: "script", attrs: { type: "application/ld+json", }, content: JSON.stringify({ "@context": "https://schema.org", "@type": "WebSite", url:... - Source: dev.to / almost 2 years ago

Alternatives to ExtendsClass JSON Generator and ASO.dev

When comparing ExtendsClass JSON Generator and ASO.dev, you can also consider the following products.

Loading...