Comparison

SparkDeck vs JS Shell

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

Head to head
About

SparkDeck

Read full description

SparkDeck is a remote command center for NVIDIA DGX Spark AI workstations. Monitor your GPU, run SSH commands, and manage Docker containers from anywhere. KEY FEATURES โ€ข Real-Time Dashboard GPU utilization, VRAM, temperature, power draw, and storage โ€” all at a glance. โ€ข SSH Terminal Access (Pro) Full PTY terminal with multi-session support. Connect via LAN or Tailscale. โ€ข Docker Management (Pro) Start, stop, and restart containers remotely with one tap. โ€ข Local LLM Chat Chat with your on-device LLMs. Conversations never leave your hardware. โ€ข Multi-Device Fleet (Pro) Connect and manage multiple DGX Spark machines from a single app. WHO IT'S FOR AI researchers, ML engineers, and DGX Spark owners who need control on the go. PRO SUBSCRIPTION SparkDeck is free for basic monitoring. Unlock SSH, advanced Docker, and multi-device with Pro: - Monthly: $3.99/month - Annual: $29.99/year (save 37%) Subscriptions auto-renew unless cancelled at least 24 hours before the end of the period. Manage in your App Store account. REQUIREMENTS iOS 18.0 or later, an NVIDIA DGX Spark with the SparkDeck Agent installed, and SSH credentials. Terms of Use: https://sparkdeck.net/terms Privacy Policy: https://sparkdeck.net/privacy

About

JS Shell

Features
Read full description

JS Shell is a pocket-sized developer console that lets you write, run, and test web code (HTML, CSS, JavaScript) directly on iOS and macOS. No Xcode, no laptop, no remote server. Paste a page in, tap run, and it loads in a real WKWebView served from a local HTTP origin. A real secure-context origin on iOS, so modern web APIs โ€” from WebRTC to Geolocation โ€” behave the way they should. KEY FEATURES Local HTTP server. An in-process server bound to the loopback interface. Provides a real secure-context origin so modern Web APIs work out of the box. Not reachable from outside the device. JavaScript REPL. A full JavaScript runtime backed by JavaScriptCore. Type js to enter the REPL. console.log, fetch, setTimeout, setInterval, Promises, and async await are all available. Real Promises, real microtasks, real JSON parsing, real URL parsing. Geolocation support. Test navigator.geolocation on a real iOS device. Permissions are handled by the system, just like Safari. Useful for validating location-based web features without deploying to a server. Persistent file system. Files you paste live in your Documents directory and survive app restarts. Each downloaded package gets its own directory. iCloud backup picks them up like any other app data. SQLite key-value store. A real B-tree on disk via SQLite. Read and write from your pages with same-origin fetch. No CORS configuration required. curl. A subset of curl built on URLSession. The flags X, H, d, i, I, o, A, m, v are supported. Pretty-prints JSON responses and saves binary blobs to the virtual filesystem. Archive extraction. In-process tar, tar.gz, tgz, gz, and zip extraction. No shelling out. Download a release tarball with curl, extract it, and run it immediately. Voice commands. Tap the mic, speak a command. Apple Speech framework converts speech to text. Auto-submits on detected silence. Voice commands are saved to the scripts list for one-tap re-run. Saved scripts. Save any sequence of commands as a named script. One-tap to re-run later. Voice-recognized commands are auto-saved to the scripts list for instant replay. Mac Catalyst support. Runs natively on macOS as a Mac Catalyst app. Multi-window, resizable, fullscreen-capable. The same code that runs on your iPhone runs on your Mac. DESIGNED FOR DEVELOPERS JS Shell is a tool for people who want to test web code on a real iOS device without installing Xcode, syncing files, or setting up a tunnel. It is especially useful for: Testing geolocation, camera, and microphone permission flows on iOS. Validating fetch, CORS, and cookie behavior on a real iPhone. Building small offline web tools that need persistent state. Running JavaScript snippets without opening Safari Inspector. Debugging mobile rendering edge cases on the device itself. PRIVACY JS Shell does not collect any user data. There is no telemetry, no ads, no analytics, no third-party SDKs, no remote configuration. Everything you type, paste, or download stays on your device. The local HTTP server only listens on the loopback interface and is not reachable from any network. The app forwards camera, microphone, speech recognition, and location permissions to web pages you load, exactly like Safari does on macOS. The first time a page tries to use them, iOS shows the standard system permission prompt. The first time a page tries to use them, iOS shows the standard system permission prompt.

Screenshots

SparkDeck4 screens
JS Shell3 screens

Verdict

The call

The clearest difference is in-app purchases: JS Shell at none against SparkDeck's 2. SparkDeck's advantage is chart position (#62 vs unranked). On price, ads, device support and iOS requirement 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. SparkDeck sells 2 in-app purchases, starting at $3.99 per month. JS Shell asks for nothing beyond the download.

Scorecard2 real differences ยท 4 level
SparkDeck versus JS Shell: the parameters behind the verdict, then further details
ParameterSparkDeckJS Shell
PriceFreeFree
AdsNoNo
In-app purchasesYesNo โ€” better
Best chart rank#62 โ€” betterโ€”
DevicesiPhoneiPhone, iPad โ€” better
Requires iOS18.017.0 โ€” better
Further details โ€” not scored
Size15 MB6 MB
Age rating+417+
DeveloperYunus SahinJowb Inc.

In-app purchases

2 purchases

SparkDeck

Subscriptions2
  • Pro Monthly$3.991 Month
  • Pro Yearly$29.991 Year
None

JS Shell

No in-app purchases

Questions

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

Other comparisons