iOptron Commander (iOS) vs GuideWatch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iOptron Commander (iOS)
Control your iOptron telescope mount remotely using your iOS device. This utility allows for basic functions like slewing to celestial objects, syncing time and location, and managing compatible mount series.
- Remote telescope mount control
- Slew to stars and deepsky objects
- Sync time and site from iOS
- Supports HEM, HAE, HAZ, CEM, GEM series mounts
- Basic control functions
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This is an application for owner of iOptron telescope mounts to remote control their telescope mounts via iOS devices. This lite version has some basic function such as slew to famous stars, named deepsky objects, solar system, sync time and site from iOS devices, and etc. Compatible product list: All HEM series All HAE series All HAZ.series CEM120 series CEM70 series GEM45 series CEM40 series GEM28 series CEM26 series SkyHunter
GuideWatch
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GuideWatch puts your PHD2 guiding session on your wrist. If you run NINA to control your astrophotography rig, you already know the drag of walking back to the laptop every few minutes just to check whether guiding is still holding steady. GuideWatch connects directly to either PHD2 or NINA over your local Wi-Fi network and shows you what matters, right on your Apple Watch: • Live guiding graph: see RA/Dec error trends update in real time, just like the graph in PHD2 itself • RMS error and key guiding stats at a glance, with optional haptic alerts if guiding fails • Simple connection status, so you know instantly if guiding has dropped out • A quick settings screen to connect to PHD2 or NINA on your controller's IP address and port No need to keep walking back to a screen, break your dark adaptation, or leave a laptop running somewhere inconvenient (just glance at your wrist). GuideWatch also includes a simulation mode, so you can explore the app and its guiding display before connecting it to a live session. Requirements: GuideWatch needs either PHD2 or a NINA instance with the Advanced API module running on the same local network. GuideWatch does not control PHD2, NINA or your imaging session; it's a read-only guiding monitor designed to keep you informed without needing to touch your imaging laptop.
Screenshots
Verdict
The clearest difference is update cadence: GuideWatch at fortnightly against iOptron Commander (iOS)'s every 6 months. iOptron Commander (iOS)'s advantage is iOS requirement (18.6 vs 26.5). 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.
iOptron Commander (iOS) ships an update every 6 months, GuideWatch fortnightly. The most recent releases landed on October 2, 2026 and October 8, 2026 respectively.
| Parameter | iOptron Commander (iOS) | GuideWatch |
|---|---|---|
| Price | Free | Free |
| Rating | 1.9 (14 ratings) — better | — |
| Positive reviews | 6.3% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 6 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 18.6 — better | 26.5 |
| Further details — not scored | ||
| Size | 24 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 成城 徐 | Cambridge AI Works Ltd. |
In-app purchases
iOptron Commander (iOS)
No in-app purchases
GuideWatch
No in-app purchases
Questions
Is iOptron Commander (iOS) free?
Is GuideWatch free?
Do iOptron Commander (iOS) or GuideWatch have ads?
Which is updated more often, iOptron Commander (iOS) or GuideWatch?
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