Freemium

Physics AI is a specialized online physics problem solver designed for students who need on-demand, step-by-step explanations. The tool accepts both photo uploads and typed questions, generating solutions that include free-body diagrams with vector arrows to illustrate tension, friction, and gravity components. Operating on a credit-based freemium model, it offers a free tier with 7 monthly credits, a Plus tier at 500 credits per month, and a Premium tier at 1,200 credits per month. Paid plans unlock Guided Mode, visual explanations, priority reply, and access to advanced AI models. The platform positions itself within the AI education assistant category as a physics-specific alternative to general-purpose homework solvers, though the vendor does not disclose the underlying AI model or accuracy benchmarks on the homepage.

Create personalized digital birthday cards with photo upload and template designs. Features free preview, watermark-free PNG download, and private share link for direct recipient delivery.

A web-based headcanon generator that helps fandom writers create character details, relationship dynamics, and narrative seeds from user-provided context.

Kling 3.0 is a web-based AI video generator that creates video clips from text descriptions or static images with integrated native audio. The platform offers four credit-based subscription plans with watermark-free export, commercial licensing, and tiered queue speeds for content creators and video professionals.

Loview AI centers on the Nano Banana image generator, providing a four-step browser-based workflow for generating, comparing, and exporting images across multiple model versions. The Pro tier targets production use with high-resolution PNG output, while an optional video extension via Veo 3 and Sora 2 differentiates it from single-purpose generators. A freemium model gates Pro access and daily volume behind paid plans.

How to Pose AI integrates pose planning, outfit exploration, and framing judgment into one connected pipeline. Designed for creators and e-commerce teams who need controlled, usable outputs for campaign planning and product imagery.

AI-powered video effects platform with sub-60-second processing and multi-aspect ratio output. Free trial credits available with flexible pay-per-use pricing.

AI video generation platform powered by Gemini Omni and Veo 3.1, offering 4K HDR output and multi-format support for social media, advertising, and film pre-visualization.

Mathe AI is an AI-powered mathematics solver that provides step-by-step solutions via a question-based input interface. The platform offers an advanced AI mode for complex problems and an unlimited subscription tier. The interface is primarily German-language, targeting students in German-speaking regions.

AI-powered image upscaling tool offering Fast mode for batch 4x enlargement in 3 seconds and Pro mode with five specialized AI models. Delivers watermark-free output up to 4096×4096 pixels with a free tier of 1,300 credits per month.

JustAI's 小加同学 is an AI content marketing agent designed for Chinese small and medium businesses. It accepts plain-language requests and generates complete content packages — Xiaohongshu graphic notes, WeChat articles, marketing plans, PPT decks, and AI cover images — without requiring prompt engineering. The platform also includes QR-code-based UGC tools for customer review generation and supports multi-platform distribution across Xiaohongshu, WeChat, Douyin, Dianping, and Meituan.

VideoFX Studio is an AI-powered video generation platform that creates cinematic cutscene footage from text descriptions and converts concept art into animated previews, with export options up to 4K on premium plans.

Dr7.ai is a medical AI platform offering three specialized models: CheXagent for chest X-ray radiology analysis, BiomedCLIP for medical image-text multimodal understanding, and Clinical Camel for healthcare dialogue. API access is advertised across product pages but the OpenAPI specification endpoint returns 404. A free tier and promotional Pro Plan are available, though standard pricing tiers are not disclosed and no independent benchmarks accompany any model.

ZOOOP provides a REST API and an AI Agent Skill for programmatic generation of images, video, and audio. Designed to eliminate browser context-switching, it integrates directly into coding agents like Claude Code, Cursor, and Codex with auto-syncing project-based asset management and credit-based consumption controls.

AIHappyHorse is an AI video generation model developed by Alibaba's Taotian Group. It generates cinematic 1080p video with synchronized audio and multi-language lip sync in a single forward pass, eliminating post-production dubbing.

TeachQuill is a free-to-start AI platform designed for K-12 educators that generates lesson plans, classroom materials, assessments, and learner support documents. It covers five core workflows — planning, materials, engagement, assessment, and support — within a single interface and offers tiered pricing from a free plan to an Enterprise offering with admin controls.

AI-powered browser tool that sharpens photos blurred by camera shake, missed focus, or low resolution. Batch process up to 30 images at once.

Sprite Flow is a web-based AI tool that generates character sprite sheets and animations for game development. Users describe characters in text, select art styles and animation types, and receive export-ready sprite sheets compatible with Unity, Godot, and Unreal Engine.

Seedance 3.0 is an AI video generator that supports multi-reference input, combining images, videos, audio, and text prompts for video creation with an interface available in eight languages.

JSON to Video is an API-first service that converts JSON input into rendered video using integrated AI models. The vendor highlights CMS-triggered automation, spreadsheet batch processing, and n8n workflow compatibility as core patterns. Primary evidence is limited to the official homepage and embedded user testimonials; independent third-party validation is not yet available.

AI Lip Sync Video is a web-based lip-sync localization tool that enables export teams and social commerce marketers to produce multi-language video versions from a single recording. Users upload translated audio and the platform automatically re-synchronizes mouth movements, generating market-specific outputs for Shopify, TikTok Shop, and global social channels.

An AI agent security API that detects prompt injection, jailbreak attempts, and manipulation tactics, classifying input into AGENT_HACK, SYS_FLAG, CONTENT_FLAG, or SAFE categories with a reported 90.4% true negative rate.

A browser-based AI image platform bundling generation, editing, effects, and export prep for marketing and ecommerce teams who need production-ready visual assets.

A web-based AI hairstyle transformation tool that lets users preview different hairstyles on their own photos through a simple browse-upload-generate workflow with credit-based pricing.