Blipr Notifications vs Sandbox Relay
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Blipr Notifications
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Blipr turns any topic into an instant push notification. Create a topic in the app and get alerted the moment a message is published to it - from your servers, scripts, CI, cron jobs, or a one-line curl. Priority 5 alerts are Time-Sensitive: they break through Focus and Do Not Disturb, so the one that matters always reaches you. - Instant delivery over a live connection - watch messages arrive in real time - One Feed for every topic - search, filter by topic, unread or priority, and reply from the list - Priority levels 1-5, with Time-Sensitive delivery at the top level - Publish from anywhere: curl -d "hello" https://blipr.dev/blip/your-topic - Reply from a notification - tap Yes/No or Acknowledge without opening the app - Self-hostable: use blipr.dev or point Blipr at your own server - Share a topic with a QR code or link - Sign in with Apple to create topics, and keep them in sync across your devices - Light & dark, Dynamic Type, built for iOS Blipr is a client for an ntfy-style notify service. Creating a topic takes a free account; publishing to one and subscribing to it do not. Topics are public by name - use a long, unguessable name for anything sensitive.
Sandbox Relay
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For developers who run Claude Code or Codex in Docker Sandbox, Sandbox Relay is the phone client for driving that agent. It is a companion, not a standalone app: it needs a broker you run, with an agent connected behind it. Kick off a task from the train, check on a long-running job from the couch, or steer the agent while you are away from your desk. Docker Sandbox runs each agent in its own isolated micro VM. A small broker you self-host sits in the middle: you send work from your phone, the broker passes it to the agent, and the streamed reply comes back. Your infrastructure, your agent. The app is just the remote. New to this setup? The app's support page explains how it works and what you need to run it. WHAT YOU CAN DO - Connect to your broker with a URL and a bearer token. Connections use HTTPS, with plain HTTP allowed only for local-network addresses. - See every connected agent at a glance, with live online/offline status. - Send the agent work and watch its reply stream in token by token. Stop a turn mid-stream, or start a fresh thread whenever you want. - When an agent goes offline, its thread stays readable as history. - See per-turn input and output token counts when the broker reports them. - Save reusable prompts as local notes, organised by hierarchical tags like #work/project/feature. Drill down by tag, copy a note straight into a thread, or link a note to the thread it came from. Notes live on your device only; they never touch the broker. WHAT YOU NEED - A broker you run, reachable from your phone (over your local network, or remotely through a tunnel or private network you control). - A coding agent, Claude Code or Codex, running in Docker Sandbox and connected to that broker. PRIVACY Sandbox Relay talks only to the broker you configure. Your access token is stored securely on your device and sent only to that broker, to authenticate you; it never goes to the developer or any third party. Your notes stay on your device and are never sent anywhere. No third-party analytics, no account to create. Note that the app streams whatever your agent outputs, verbatim.
Screenshots
Verdict
Blipr Notifications and Sandbox Relay are too close to call on the numbers: across 5 compared parameters โ price, ads, in-app purchases and device support among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Blipr Notifications | Sandbox Relay |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days | โ |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 16.4 โ better |
| Further details โ not scored | ||
| Size | 6 MB | 32 MB |
| Age rating | 17+ | 12+ |
| Developer | Applogico LLC | Eric Boumendil |
In-app purchases
Blipr Notifications
No in-app purchases
Sandbox Relay
No in-app purchases
Questions
Is Blipr Notifications free?
Is Sandbox Relay free?
Do Blipr Notifications or Sandbox Relay have ads?
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