An honest look at the tools developers use to watch coding agents and reach their dev machine from a phone: the first-party apps from Anthropic and OpenAI, agent remotes like Happy, and old standbys like SSH clients and VPNs.
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| Feature |
DevReins
this tool
|
Termius
SSH client
|
Tailscale
VPN mesh
|
Happy Coder
agent remote
|
Anthropic
remote control
|
OpenAI
Codex remote
|
|---|---|---|---|---|---|---|
| Cross-vendor agent support Claude, Codex, Gemini, Aider | ✓ | ✗ | ✗ | ~ Claude + Codex | ✗ Claude only | ✗ Codex only |
| Mobile-native UI Not pixel streaming or screenshot relay | ✓ | ✓ | ~ VPN only | ✓ | ✓ | ✓ |
| Self-hosted option Run on your own infrastructure, no cloud dependency | ✓ | ~ Enterprise gateway | ✓ via Headscale | ✓ | ✗ Anthropic bridge | ✗ OpenAI bridge |
| Push notifications Alert when agent needs your input | ~ web push; native apps planned | ~ connection alerts | ✗ | ✓ | ✓ | ✓ |
| Terminal access Full PTY / interactive shell on remote machine | ✓ | ✓ | ✗ needs SSH client | ~ agent-mediated | ~ through Claude | ~ through Codex |
| File browser + search Browse, open, and full-text search project files | ✓ | ✓ | ✗ | ~ inline / changed files | ~ through Claude | ~ through Codex |
| Git diff viewer Status, commit log, per-file diffs | ✓ | ✗ | ✗ | ~ inline diffs | ~ diffs in chat | ~ diffs in chat |
| Open URL/port localhost framed in a mobile viewport | ✓ | ~ port forwarding | ~ via Funnel (URL only) | ~ not advertised | ~ not advertised | ~ not advertised |
| AI agent supervision Purpose-built for watching agents work | ✓ | ✗ | ✗ | ✓ chat + approvals | ✓ Claude only | ✓ Codex only |
| Hosted relay (managed URL) Reach your box without port-forwarding | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Native iOS app App Store download; no browser required | ~ PWA (installable) | ✓ | ✓ | ✓ | ✓ Claude app | ✓ ChatGPT app |
| End-to-end encryption Data encrypted before leaving the device | ✓ sealed payloads | ✓ | ✓ | ✓ | ~ provider sees chat | ~ provider sees chat |
| Multi-machine fleet Switch between dev boxes from your phone | ✓ | ✓ | ✓ | ✓ | ~ | ✓ host switching |
| Cellular optimized Works well on LTE/5G, not just Wi-Fi | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Open / source-available Code publicly viewable or inspectable | ~ planned | ~ clients OSS | ~ clients OSS | ✓ MIT | ✗ | ✗ |
| Pricing Starting cost | Free early access $19/mo target after early access | Free tier + $8.33/mo | Free tier + $6/user/mo | Free open source | Eligible Claude account check current plan rules | Eligible ChatGPT account check current plan rules |
Data sourced from each product's public documentation and App Store listings as of July 2026. Competitor details change; check their sites for the latest. Rows marked ~ indicate partial support or where we have lower confidence in the claim.
The table sticks to six columns, but this market moves fast. These are the other serious options, described in their own terms. Several of them reach local tools, diffs, files, or a terminal too.
Every tool on this list has a clear strength. Here's when to reach for each one.
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