Tiger Math VS DynamicDocumentAPI

Tiger Math's answer

Tiger Math is ad-free with no in-app upsells, and unlocks with a single one-time lifetime purchase instead of a subscription — that pricing model covers under 5% of the app market. Kids progress through a story-mode adventure instead of loot boxes or streak-guilt mechanics, the app works fully offline, and it's available in 8 languages across iOS and Android.

DynamicDocumentAPI's answer:

It covers the whole path from data to finished document in one API: you design a template in a visual or HTML editor (or send raw HTML, CSS or Markdown), send JSON, and get a PDF or image back. The same service also creates e-invoices (XRechnung, EN 16931, Factur-X / ZUGFeRD) that are validated against the official rules before they are returned, and can embed them in the PDF. Rendering is deterministic: the same template and data always give the same document, laid out by a headless browser, with no AI model generating content. Everything runs in the EU (Germany). It also ships an MCP server, so AI agents like Claude and ChatGPT can render documents directly.

Tiger Math's answer

Most math apps for kids (Prodigy, SplashLearn, IXL, Mathletics) run on subscriptions or ad-supported freemium models. Tiger Math is a single purchase that covers up to 5 kids for life — no recurring cost, no ads, ever. It's also narrowly focused on 8 core math topics for ages 6–12, rather than being a broad multi-subject platform, so the difficulty adapts specifically to math skill progression.

DynamicDocumentAPI's answer:

Most document APIs do one thing: convert HTML to PDF, or fill templates. Dynamic Document API does both, adds image templates, PDF merging and validated e-invoices, and offers them through a REST API, SDKs for Node and Python, Zapier, Make, n8n and an MCP server for AI agents. Data is processed and stored in the EU only, files come back as signed links that expire, and storing nothing at all is a supported option. Pricing is predictable: one published credit table, the same core features on every paid plan and a spend cap you control. We also publish a render-time benchmark with its method and raw data, so you can check our speed instead of trusting a claim. The free plan includes 50 renders a month without a credit card.

Tiger Math's answer

Parents of children ages 6–12 looking for focused, distraction-free math practice — particularly homeschool families and parents who want a low-pressure, structured tool for kids who find traditional math practice frustrating (including ADHD-friendly, low-clutter design).

DynamicDocumentAPI's answer:

Developers and product teams whose software has to send documents: invoices after a payment, certificates after a course, reports, labels and statements. Typical users are SaaS companies, marketplaces, e-commerce and learning platforms. A second group are businesses in Germany and the EU that need compliant e-invoices (XRechnung, ZUGFeRD) for the German B2B e-invoicing mandate and public-sector buyers. No-code builders use it through Zapier, Make and n8n, and teams building AI agents use the MCP server.

Tiger Math's answer

Tiger Math started because my son kept getting bored on his phone — the games he had access to were either mindless or loaded with ads and upsells. I wanted to build something that would hold his attention while actually teaching him math, without the manipulative mechanics most kids' apps rely on. That's why it's ad-free, story-driven instead of loot-box-driven, and a one-time purchase instead of a subscription — it's built the way I wanted my own kid's math app to work.

DynamicDocumentAPI's answer:

Almost every product eventually needs to produce documents, and most teams end up building their own rendering stack: a headless browser, fonts, page breaks, storage and retries. It works until an invoice splits a table row or a certificate shows the wrong date, and then it becomes a support ticket. We built Dynamic Document API to be that layer for them: templates, rendering and delivery as one service, hosted in Europe, treating pagination, fonts and formatting as engineering problems rather than edge cases. When e-invoicing became mandatory for B2B in Germany, we added validated XRechnung and ZUGFeRD output, and with AI agents producing more paperwork, an MCP server followed.

Tiger Math's answer

Built with React Native

DynamicDocumentAPI's answer:

Rendering runs in Rust workers that drive headless Chromium over the DevTools protocol, with MiniJinja for templates. The API and control plane are built with Django and Django REST Framework, with Celery, PostgreSQL, Valkey and NATS JetStream for queues and events, and S3-compatible object storage for files. PDF/A output is checked with veraPDF and e-invoices with the official KoSIT validator. The dashboard and website are built with Next.js. Everything runs on Kubernetes in data centres in Germany.

Tiger Math's answer

Individual families — Tiger Math is a consumer app, not sold to organizations, so there's no B2B customer list to share.

DynamicDocumentAPI's answer:

Dynamic Document API is a young product. Our users are mostly developers and small SaaS teams, and we don't name customers without their permission.