Comparison

Pi Relay vs Un Bien

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

Head to head
About

Pi Relay

Features
Read full description

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

About

Un Bien

Features
Read full description

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

Pi Relay4 screens
Un Bien4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Pi Relay ships an update fortnightly, Un Bien weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 6 level
Pi Relay versus Un Bien: the parameters behind the verdict, then further details
ParameterPi RelayUn Bien
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS17.0 — better18.0
Further details — not scored
Size2 MB7 MB
Age rating12+4+
DeveloperZerui ZhouGeorge Harker

In-app purchases

None

Pi Relay

No in-app purchases

None

Un Bien

No in-app purchases

Questions

Is Pi Relay free?
Pi Relay is free to download, with no in-app purchases.
Is Un Bien free?
Un Bien is free to download, with no in-app purchases.
Do Pi Relay or Un Bien have ads?
Neither Pi Relay nor Un Bien shows ads.
Which is updated more often, Pi Relay or Un Bien?
Pi Relay ships an update fortnightly, and Un Bien weekly. Most recently, Pi Relay was updated on October 25, 2026 and Un Bien on October 24, 2026.

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