Comparison

iOptron Commander (iOS) vs GuideWatch

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

GuideWatch

Features
Read full description

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

iOptron Commander (iOS)4 screens
GuideWatch1 screens

Verdict

The call

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

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

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.

Scorecard2 real differences · 8 level
iOptron Commander (iOS) versus GuideWatch: the parameters behind the verdict, then further details
ParameteriOptron Commander (iOS)GuideWatch
PriceFreeFree
Rating1.9 (14 ratings) — better—
Positive reviews6.3% of reviews—
Number of ratings14 — better—
Update frequencyEvery 6 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS18.6 — better26.5
Further details — not scored
Size24 MB4 MB
Age rating4+4+
Developer成城 徐Cambridge AI Works Ltd.

In-app purchases

None

iOptron Commander (iOS)

No in-app purchases

None

GuideWatch

No in-app purchases

Questions

Is iOptron Commander (iOS) free?
iOptron Commander (iOS) is free to download, with no in-app purchases.
Is GuideWatch free?
GuideWatch is free to download, with no in-app purchases.
Do iOptron Commander (iOS) or GuideWatch have ads?
Neither iOptron Commander (iOS) nor GuideWatch shows ads.
Which is updated more often, iOptron Commander (iOS) or GuideWatch?
iOptron Commander (iOS) ships an update every 6 months, and GuideWatch fortnightly. Most recently, iOptron Commander (iOS) was updated on October 2, 2026 and GuideWatch on October 8, 2026.

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