Comparison

HookNotifier vs Chapper

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HookNotifier

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Getting a notification when something happens should not require building an app, a Firebase project, and a backend. Hook.Notifier is the last mile: you get a personal URL, you call it from anything that can make an HTTP request, and a real native notification lands on your iPhone. One HTTP request. A notification on your phone. That is the whole thing, and it is free. WHAT YOU CAN DO WITH IT Send yourself a push from a shell script, a cron job, a webhook (Stripe, GitHub, Shopify, Supabase), a Zapier or Make automation, a monitoring tool like Uptime Kuma or Grafana, or a few lines of code in any language. If it can make an HTTP request, it can notify you. • Get pinged when a payment fails, a build breaks, a server goes down, a form is submitted, or a new order comes in. • Know the moment a cron job finishes, a backup completes, or a container stops. • Turn any webhook into a phone notification without a middleman. BUILT FOR REAL USE • Priorities: low, normal, high, critical. Critical is delivered as time-sensitive so real incidents still reach you. • Quiet hours: silence normal notifications on your schedule, let the urgent ones through. • Tags: colored folders to route and filter your notifications, with per-tag mute. • A real inbox: your notifications are kept, searchable, and organized, not just fired and forgotten. • Scheduled delivery: send now, or in 10 minutes, or at an exact time, up to three days ahead. • Updates in place: a long job can be one notification that goes from "running" to "done" instead of a pile of pings. • Markdown, images, and up to three action buttons on a notification. • Named hooks: a dedicated, revocable URL per source, each with its own defaults, so you can cut one off without touching the others. • Team sharing: notify everyone on your team at once. • Multi-device: receive on every device you sign in on. NO INFRASTRUCTURE No Firebase project. No Apple push certificates. No backend to store device tokens. No app to build. Hook.Notifier handles the plumbing so you just send a request and get notified. FREE Hook.Notifier is free. No subscription, no per-notification quota. Send as much as you actually need. WHO IT IS FOR Developers, makers, indie hackers, sysadmins, no-coders, and anyone tired of rigging up Discord or Telegram bots just to get a ping on their phone. Get your URL, call it from anything, get notified. That is Hook.Notifier.

About

Chapper

This app provides a privacy-focused AI chat experience on your iPhone and iPad. It connects to local LLMs and self-hosted AI servers, offering features like custom personas, rich markdown rendering, and a sandboxed terminal for local workflows. Enjoy full control over inference settings and secure storage of API keys.

Highlights
  • On-device local models
  • Custom AI personas
  • Rich Markdown rendering
  • Model management
  • MCP Tools integration
  • Sandboxed terminal environment
  • Export conversations in multiple formats
Features
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Chapper is a powerful, privacy-first AI chat client for iPhone and iPad that runs on-device models and connects directly to local LLMs, LM Studio, self-hosted AI servers, and OpenAI-compatible endpoints. No accounts. No forced cloud. No subscription. Whether you run LM Studio, Ollama, llama.cpp, or another OpenAI-compatible endpoint, Chapper gives you a polished, fully native iOS experience for chatting with your models, managing conversations, tuning inference settings, using tools, and working with local AI on your own terms. Built in SwiftUI from the ground up, Chapper is designed to feel like a real iPhone and iPad app, not a web wrapper. FEATURES • On-Device Local Models Run supported AI models directly on iPhone and iPad for private local inference, including MLX models and Apple Foundation Models where available. • Personas Create and switch between custom AI personas, each with their own system prompt, tone, and language. Built-in personas include Code Expert, Translator, Teacher, Analyst, Brainstormer, and more. • Thought Process See reasoning output from supported models in a collapsible panel above responses. • Rich Markdown Rendering Full support for code blocks, tables, lists, emphasis, and structured responses. • Model Management Browse, inspect, select, load, and unload models directly from the app where supported. View quantization, context length, tool support, vision support, and active status. • MCP Tools Built-in tool workflows for web search, current time, server status, model listing, chat search, file and directory access, URL fetching, export actions, and more. • C.A.S.H. Terminal A built-in sandboxed terminal environment for practical local workflows, file operations, shell scripting, and AI-assisted tool execution. • Files App Integration Access Chapper workspace files directly in the iOS Files app, including exports and tool-related content where supported. • Memory Save useful long-term information and inject it into conversations automatically for more consistent assistance across chats. • Prompt Templates Save and reuse common prompts instantly. • Full Parameter Control Adjust temperature, token limits, repeat penalty, Top-K, Top-P, Min-P, TFS-Z, Flash Attention, KV-cache offload, context length, keep-alive, structured output, and more. • Search Full-text search across chats and message history. • Export Export conversations in multiple formats including TXT, PDF, HTML, Markdown, JSON, CSV, and XML. • Keychain Support Store API keys securely using iOS Keychain. • iCloud Sync Optionally sync chats across devices with iCloud. • Analytics Dashboard View on-device usage stats and activity insights. • Text to Speech Listen to responses with native, local, or server-based TTS playback. • Chat Info Inspect timestamps, counts, tags, folder assignment, and other conversation metadata. • Server Tools Configure, save, and reuse server connections for a smoother local AI workflow. • JSON Lab Work with custom JSON requests and experimental API workflows directly inside Chapper. • Chapper Pro One-time purchase. Unlock unlimited chat history, all export formats beyond plain text, advanced sampling and structured output controls, MCP tools in normal chat, C.A.S.H. terminal access with shell scripting and AI shell tooling, premium personas and prompt templates, memory and analytics extras, iCloud sync, live vision chat, premium appearance options including additional app icons, and future Pro features. No subscription. COMPATIBILITY Chapper works with on-device models, LM Studio, Ollama, llama.cpp, and OpenAI-compatible servers. Some features depend on your model or server. PRIVACY Chapper is built with privacy in mind. Your chats stay on your device unless you explicitly enable iCloud sync or connect to your own server. No accounts required. No third-party tracking. Chapper is built for people who care about local AI, privacy, model control, and a true native iOS experience.

Screenshots

HookNotifier4 screens
Chapper4 screens

Verdict

The call

The clearest difference is in-app purchases: HookNotifier at none against Chapper's 8. HookNotifier also leads on iOS requirement (15.0 vs 17.0). Chapper's advantage is device support. On price there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Chapper sells 8 one-off in-app purchases. HookNotifier asks for nothing beyond the download.

Scorecard3 real differences · 7 level
HookNotifier versus Chapper: the parameters behind the verdict, then further details
ParameterHookNotifierChapper
PriceFreeFree
Rating—3.1 (9 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—9 — better
Update frequency—Every 2 days
Ads—No
In-app purchasesNo — betterYes
Monetization—Free
Devices—iPhone, iPad — better
Requires iOS15.0 — better17.0
Further details — not scored
Size23 MB142 MB
Age rating4+4+
DeveloperEmmanuel RusseilPrevolut Ltd

In-app purchases

None

HookNotifier

No in-app purchases

8 purchases

Chapper

One-time8
  • Mini Tea$0.99
  • Cup of Tea$1.99
  • On Device Local Inference$4.99
Show 5 more
  • Can of Tea$6.99
  • Chapper Pro$9.99
  • Kettle of Tea$12.99
  • Crate of Tea$24.99
  • Barrel of Tea$44.99

Questions

Is HookNotifier free?
HookNotifier is free to download, with no in-app purchases.
Is Chapper free?
Chapper is free to download, with in-app purchases available.

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