Pi Relay vs Un Bien
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pi Relay
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Pi Relay is a companion iPhone app for the Pi coding agent. It lets you connect securely to your own Pi remote-control server, browse active projects and sessions, and continue conversations from your phone. Pairing is simple: install the Pi remote-control extension on the machine running Pi, open the pairing QR code, and scan it with Pi Relay. Once paired, you can switch between remotes, view project sessions, read conversation history, send new prompts, abort running work, and request context compaction with /compact. Pi Relay is designed for users who already run Pi on their own computer or development environment and want a lightweight mobile companion for monitoring and continuing work away from the desktop. Key features: - QR-code pairing with your Pi remote-control server - Remote list with quick switching and unpairing - Project and session browsing - Conversation view with selectable and copyable messages - Runtime status and context usage display - Prompt sending, abort support, and /compact support - Live session updates while the app is active Pi Relay requires a running Pi remote-control extension/server. The extension is available at: https://github.com/zerray/pi-remote-control
Un Bien
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Un Bien is a native client for the Pi coding agent (http://pi.dev). Pair your phone with your own machines over a relay you host, then attach to running agent sessions: live transcripts with styled edit diffs and tool results, inline images, thinking blocks, plan & subagent panels — and an interactive prompt for ask-style clarifications. Steer mid-turn or queue follow-ups; launch new sessions on paired machines (opt-in, machine-side). Self-hosted by design: there is no Un Bien cloud, no account, and no telemetry — your relay, your keys, your machines. Includes a read-only demo mode so you can look around without any setup. Get started (self-hosting in ~5 minutes): https://docs.georgeharker.com/un-bien/main/docs/install.html App guide: https://docs.georgeharker.com/un-bien/main/docs/app-guide.html
Screenshots
Verdict
The clearest difference is update cadence: Un Bien at weekly against Pi Relay's fortnightly. Un Bien also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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.
Pi Relay ships an update fortnightly, Un Bien weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | Pi Relay | Un Bien |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 2 MB | 7 MB |
| Age rating | 12+ | 4+ |
| Developer | Zerui Zhou | George Harker |
In-app purchases
Pi Relay
No in-app purchases
Un Bien
No in-app purchases









