Comparison

OrbitLab vs Sill

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

Head to head
About

OrbitLab

Features
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OrbitLab is a visual N-body gravity simulator for exploring orbital physics. Create custom systems with stars and planets, adjust their mass, size, position, and velocity, and watch them evolve in real time. Use undo/redo, time controls, orbit trails, and live diagnostics to experiment with stability and motion. OrbitLab makes gravity easy and engaging to explore. Compare the orbits of the planets orbit at the same time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Sill

Stream your Mac's desktop or individual windows to your iPhone or iPad. Control your computer remotely using touch, keyboard, or Apple Pencil with encrypted connections. Offers flexible streaming quality and connection options.

Highlights
  • Stream Mac windows or desktop to iPhone/iPad
  • Remote control with touch, keyboard, Apple Pencil
  • Encrypted connections with TLS 1.3
  • Adjustable streaming quality and frame rate
  • Virtual display option for continuous updates
  • Multiple connection modes (Wired, Wi-Fi, Direct, Remote)
Read full description

Sill shows a window from your Mac, or its whole desktop, on your iPhone or iPad, and lets you use it with touch, a keyboard, a touchscreen trackpad or Apple Pencil. It streams straight from your Mac to your device over your own network, so there is no account to create and no server in between. You pair each device once, and every connection is encrypted. Both parts are free: the Sill app for iPhone and iPad, and Sill for Mac. Streaming: * Any single Mac window, or the whole Desktop, on your iPhone or iPad * Hardware HEVC video, up to 120 fps on ProMotion screens (60 elsewhere); the rate follows each device * Seven bitrate quality presets, from Low (4 Mbps) to Extreme (150 Mbps), plus Resolution, a frame-rate limit and Prioritize Encoding Speed * Text size (Aa): resizes your Mac window to fit your screen, so text is the size you want * Optional virtual display: a window streams from its own HiDPI display, sized to your device, and keeps updating even when covered on your Mac; full-screen video works too Controls: * Touch: tap to click, drag to scroll with momentum, touch and hold to right-click * Apple Pencil as the mouse, with hover * Software and hardware keyboards, with ⌘, ⌃ and ⌥ shortcuts, plus a key row with latching modifiers and a Spotlight key * Laptop layout when you hold the device upright: the picture on top, a key row and a trackpad (two-finger scroll, two-finger tap, hold then drag, three-finger gestures for Mission Control, App Exposé, switching Spaces, Apps and Show Desktop) * Dedicated iPhone and iPad layouts * Each Mac app's menus (File, Edit, View, etc) on your device, behind a Menus button * Window thumbnails: switch with a tap; hold one for close, minimize and full screen; drag to reorder * An Apps drawer: open windows and all installed apps, with search, and it launches apps Connecting: * Finds your Mac automatically; each Mac has 4 modes: Wired, Wi-Fi, Direct or Remote * USB cable (Wired) support, and a live session moves between the cable and Wi-Fi without dropping * Direct Wireless Connection (Direct, optional), for when you and your Mac don't share a network * Remote Access from anywhere through your own VPN, such as Tailscale, or a port forward * Pairing: every connection encrypted with TLS 1.3; pair each device once by QR code or a 12-digit code, and a USB cable pairs by itself; Require pairing is on by default * Your Mac keeps its keys in the protected part of its keychain that only Sill can read Sill for Mac: * A ~6 MB menu bar app with a live status card: each device, its frame rate and latency * Settings: General, Devices, Streaming, Virtual Display, Remote Access and Permissions * Launch at Login, a log window, and an update check that tells you when a new version is out * A notarized disk image download from getsill.app Sill for iPhone and iPad: * A Settings panel that changes your Mac's stream settings, and shows the connection and latency * A first-run tour, and Take the Tour to replay it * Tells you when your Mac or the device needs an update Free and open source (Apache 2.0) No account, no servers, no tracking: video goes straight from your Mac to your device, forever! Website: https://getsill.app/ GitHub: https://github.com/Saffsanity/sill Site GitHub: https://github.com/Saffsanity/sill-site

Screenshots

OrbitLab4 screens
Sill4 screens

Verdict

The call

The clearest difference is update cadence: Sill at every 2 days against OrbitLab's every 2 months. 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

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

OrbitLab ships an update every 2 months, Sill every 2 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
OrbitLab versus Sill: the parameters behind the verdict, then further details
ParameterOrbitLabSill
PriceFreeFree
Rating—4.9 (44 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—44 — better
Update frequencyEvery 2 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size7 MB3 MB
Age rating4+4+
DeveloperSHIH-CHEN FANNOAH WILLIAM SAFFER

In-app purchases

None

OrbitLab

No in-app purchases

None

Sill

No in-app purchases

Questions

Is OrbitLab free?
OrbitLab is free to download, with no in-app purchases.
Is Sill free?
Sill is free to download, with no in-app purchases.
Do OrbitLab or Sill have ads?
Neither OrbitLab nor Sill shows ads.
Which is updated more often, OrbitLab or Sill?
OrbitLab ships an update every 2 months, and Sill every 2 days. Most recently, OrbitLab was updated on October 25, 2026 and Sill on October 31, 2026.

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