Sider

Sider is an AI assistant app for iPhone and iPad that brings chat models from several providers into one app. It is for people who want help with reading, writing, homework, research and everyday questions from a single assistant available 24/7. Sider is built by Vidline Inc. and runs on models such as GPT, Claude, Gemini, Grok, DeepSeek, Kimi, GLM and Qwen, alongside its own Sider Fusion model.

A user picks a model or lets Sider Fusion choose, which dynamically selects a model for each response. Questions can be typed directly, or a user can upload documents, images and web links in more than 30 file formats and ask questions about them. For larger jobs, Sider Hand takes a request for research, comparison, extraction or content creation, works across several websites and sources, and returns summaries, tables, reports, drafts or files.

Reading assistance summarizes, translates and explains documents, images and web links. A writing helper creates and rewrites essays, posts and emails in any tone or style, and an image generator turns text into images. The Pocket Tutor solves problems, explains concepts and helps with homework and research. Wisebase acts as a knowledge base: users upload PDFs, documents and presentations or save websites by URL, then chat with several files at once for analysis.

Sider is free to download, with in-app purchases that include a Basic plan at $9.99 a month, a Pro plan at $19.99 a month, an Unlimited plan at $39.99 a month or $299.99 a year, and a Pocket plan at $49.99 a year. It requires iOS 17.0 or later on iPhone, iPadOS 17.0 on iPad and visionOS 1.0 on Apple Vision, and is available in English and 45 more languages.

Use cases

• Summarizing a long document or explaining its content
• Helping children with their homework and explaining concepts
• Turning a text prompt into images
• Drafting and rewriting essays, posts and emails in a chosen tone
• Researching and comparing information across several websites and sources
• Building a personal knowledge base from PDFs, presentations and saved websites
• Cutting repetitive browsing, copying and formatting work