KFEI SensorKit vs Codex Relay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KFEI SensorKit
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このアプリケーションは、加賀FEIが提供するBluetooth®low energyモジュールの評価用です。 サポートされているモジュール： -EY1SENSOR-KIT 特徴： -受信したセンサーデータを表示します。
Codex Relay
Manage your Codex workflow remotely from your phone. Track active threads, send prompts, review output, and respond to requests. Designed for developers to stay connected to their work without being at their desk.
- Follow Codex conversations remotely
- Send prompts and follow-up instructions
- Respond to approval and input requests
- Attach images for context
- Review workspace and thread activity
- Manage relay server state
- Check usage statistics
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Codex Relay brings your Codex workflow to your phone. Connect to your local Codex Relay server and keep track of active threads, responses, approvals, and workspace activity without staying at your desk. Send follow-up prompts, review assistant output, attach images for context, and respond when Codex needs input before it can continue. Built for developers who use Codex as part of real work, Codex Relay keeps the mobile experience focused, fast, and close to the terminal workflow. Key features: - Follow Codex conversations from your phone - Send prompts and follow-up instructions - Respond to approval and input requests - Attach images as context - Review workspace and thread activity - Manage connected relay server state - Check usage - Designed for local developer workflows Codex Relay requires a running Codex Relay server on your computer. Start the server with `npx codex-relay@latest`, then connect your device over your local network. GitHub: https://github.com/gronxb/codex-relay Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Codex Relay at every 9 days against KFEI SensorKit's every 41 months. Codex Relay also leads on chart position (#40 vs unranked) and iOS requirement (16.4 vs 18.0). 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.
KFEI SensorKit ships an update every 41 months, Codex Relay every 9 days. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.
| Parameter | KFEI SensorKit | Codex Relay |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.2 (56 ratings) — better |
| Positive reviews | — | 63.2% of reviews |
| Number of ratings | — | 56 — better |
| Update frequency | Every 41 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Best chart rank | — | #40 — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 12 MB | 118 MB |
| Age rating | 4+ | 17+ |
| Developer | KAGA FEI Co., Ltd. | Kang Sungyu |
In-app purchases
KFEI SensorKit
No in-app purchases
Codex Relay
No in-app purchases
Questions
Is KFEI SensorKit free?
Is Codex Relay free?
Do KFEI SensorKit or Codex Relay have ads?
Which is updated more often, KFEI SensorKit or Codex Relay?
Other comparisons
