AltKey Codes vs Zelmux
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AltKey Codes
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Never Search for Alt Codes Again! AltKey Codes is your offline companion for special characters and symbols. Access 800+ characters with their Alt key combinations instantly - no internet required! KEY FEATURES: 800+ Characters - Letters, symbols, math, Greek, emoticons & more 8 Categories - Organized for quick browsing Smart Search - Find by name, character, or Alt code Favorites & Recents - Save and track your most-used characters Dual Views - Switch between grid and list layouts One-Tap Copy - Copy characters or Alt codes to clipboard Completely Offline - Works anywhere, anytime PERFECT FOR: Writers needing accented letters (café, résumé, naïve) Students using math symbols (π, ∞, ±, ÷) Designers adding special characters Developers working with ASCII and Unicode Anyone typing in multiple languages PRIVACY FOCUSED: No internet connection required All data stays on your device No personal information collected No ads or tracking CATEGORIES INCLUDE: Basic & Accented Letters (À, É, Ñ, Ç) Mathematics & Symbols (±, ×, ÷, ≤, ≥) Currency (€, £, ¥, ¢) Quotes & Punctuation (" " « ») Drawing Characters Greek Letters (α, β, π, Ω) Emoticons & Symbols Full ASCII Reference From typing "café" to adding mathematical π symbols, AltKey Codes makes special characters effortless. Clean interface, instant search, and reliable offline access.
Zelmux
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Zelmux is a mobile client for Zellij,Tmux and SSH. It's optimized for Claude and Codex cli. Connect to a Zellij server running on your Mac or Linux box and attach to live sessions from your iPhone. Built for developers who run long-lived agent workflows — Claude Code, Codex, build watchers, log tails — and want to check in, steer, or paste prompts without opening a laptop. KEY FEATURES • Attach to your Zellij sessions over HTTPS and WebSocket • Secure self-signed TLS support with certificate pinning • Fast ANSI terminal rendering powered by SwiftTerm • Prompt composer with Send, Paste, and Stage modes • Bracketed-paste support for safer multi-line prompts • Saved snippets for repeat commands • Touch modes for scrolling, selection, and terminal mouse input • Pinch to zoom terminal font size • Focus mode for full-screen terminal viewing • Local-first design with no cloud account, telemetry, or third-party tracking
Screenshots
Verdict
The clearest difference is iOS requirement: Zelmux at 16.0 against AltKey Codes's 18.5. On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | AltKey Codes | Zelmux |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.5 | 16.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Ram Steenhaut | Yang Zhang |
In-app purchases
AltKey Codes
No in-app purchases
Zelmux
No in-app purchases









