Comparison

AltKey Codes vs Zelmux

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

Head to head
About

AltKey Codes

Features
Read full description

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.

About

Zelmux

Features
Read full description

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

AltKey Codes4 screens
Zelmux2 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 5 level
AltKey Codes versus Zelmux: the parameters behind the verdict, then further details
ParameterAltKey CodesZelmux
PriceFreeFree
Update frequency—Every 3 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad — better
Requires iOS18.516.0 — better
Further details — not scored
Size7 MB6 MB
Age rating4+4+
DeveloperRam SteenhautYang Zhang

In-app purchases

None

AltKey Codes

No in-app purchases

None

Zelmux

No in-app purchases

Questions

Is AltKey Codes free?
AltKey Codes is free to download, with no in-app purchases.
Is Zelmux free?
Zelmux is free to download, with no in-app purchases.
Do AltKey Codes or Zelmux have ads?
Neither AltKey Codes nor Zelmux shows ads.

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