Comparison

Relay vs Grass

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

Head to head
About

Relay

Features
Read full description

Relay is a modern API client and REST client built for iPhone and iPad. Send HTTP requests, inspect responses, and manage API workflows from anywhere. What you can do with Relay: - Send requests with common HTTP methods (GET, POST, PUT, PATCH, DELETE, and more) - Build requests with query parameters, headers, body, and auth - Test Bearer Token, Basic Auth, and API Key configurations - Inspect response body, headers, and request timing details - Validate and format JSON for faster debugging - Import cURL commands to quickly recreate terminal requests - Organize endpoints in collections and folders - Use environments and variables to switch between dev, staging, and production - Re-run requests from history to speed up testing Relay Pro unlocks advanced workflow and organization features for power users. You can start testing APIs immediately, with no account required. If you build, test, or debug APIs, Relay is the HTTP client that fits your iPhone and iPad workflow. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Grass

Features
Read full description

Meet Grass. Your agents work. You check in. Fire a task. Pocket your phone. Come back to progress. Grass RUNS Tasks on Grass Computer or your own machine - while your laptop is closed, while you're in a meeting, or while you're away from your desk. No terminal to watch. No session to babysit. Grass MOVES Send a coding session to Grass and keep the thread moving on a remote instance โ€” conversation, context, and all. Your phone buzzes when it's live. Grass ALERTS The moment your agent needs a decision or finishes the job. You don't push for status. Status finds you. Permission needed? Approve from your pocket. Grass CLEARS Every permission prompt from every thread in one tab. Read the diff. Yes or no. Keep multiple threads running in ask-mode without watching all of them. Grass STARTS A new thread in two taps. Quick chat button โ†’ bottom sheet โ†’ task running. No app switching. No losing your place. The idea fires โ€” the experiment actually runs. Grass SHOWS Which thread is which. Running, completed, waiting โ€” all visible on the home screen the moment you open the app. Switch machines with one tap. Name them whatever you want. Your harness. Your code. Our compute. Designed for AI coding agent workflows, including supported integrations with Claude Code and OpenCode.

Screenshots

Relay4 screens
Grass4 screens

Verdict

The call

The clearest difference is in-app purchases: Grass at none against Relay's 3. Grass also leads on iOS requirement (15.1 vs 26.2). On price, ads and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Relay sells 3 in-app purchases, starting at $3.99 per month. Grass asks for nothing beyond the download.

Scorecard2 real differences ยท 4 level
Relay versus Grass: the parameters behind the verdict, then further details
ParameterRelayGrass
PriceFreeFree
Update frequencyโ€”Every 2 weeks
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS26.215.1 โ€” better
Further details โ€” not scored
Size5 MB141 MB
Age rating4+17+
DeveloperCederic SchmidAnil Dukkipatty

In-app purchases

3 purchases

Relay

Subscriptions2
  • Relay Pro Monthly$3.991 Month
  • Relay Pro Yearly3 Days trial$8.991 Year
One-time1
  • Relay Pro Lifetime$17.99
None

Grass

No in-app purchases

Questions

Is Relay free?
Relay is free to download, with in-app purchases available.
Is Grass free?
Grass is free to download, with no in-app purchases.
Do Relay or Grass have ads?
Neither Relay nor Grass shows ads.

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