Tool profile
Sequence Generator Pro: cost, fit and limits
Sequence Generator Pro is a night-sky imaging automation application made by Main Sequence Software that executes complex sequences of capture events, with offline sequence building, real-time adjustment and optional Gmail progress notifications. It is aimed at imagers who run many exposures per night.
What to know first
Sequence Generator Pro is sold as a subscription. The product page shows a first year from $149 and then $59 a year, with the default option allowing three simultaneous installs and the annual cost changing with the activation count, from three to six installs. The subscription covers updates and premium support, and the vendor says it is not needed to keep using an installed version. The pages read name no AI feature.
Sequence Generator Pro at a glance
| Maker | Main Sequence Software, Not stated on the vendor pages |
|---|---|
| Free plan | No |
| Entry price | From $149 for the first year, then $59 per year |
| API access | No |
| Category | Best AI Astronomy Software in 2026, rank 8 of 13 |
| Website | sequencegeneratorpro.com |
Who Sequence Generator Pro is best for
Planners who prepare at home
Sequences can be built offline, without connected equipment, so a plan can be ready before you reach the telescope. Plans can also be reviewed at a desk before the night starts.
Imagers who tweak mid-run
Most parameters can be adjusted in real time while a sequence runs, which helps when conditions change partway through a night.
Owners who want status mail
Optional Gmail notifications report the health, progress and status of a sequence, so you can follow a night away from the scope.
Sequence Generator Pro plans and pricing
| Plan | Price | What it includes |
|---|---|---|
| Subscription (3 simultaneous installs) | From $149 now, then $59 per year | Default option with software updates and premium support. Annual cost depends on the number of activations, from three to six installs. |
Checked November 2026.
What Sequence Generator Pro does
- Sequence automation
- The about page describes automation for night-sky imaging that executes complex sequences of capture events. The vendor describes it as automation for night sky imaging, not as a planetarium or editor.
- Offline building
- Sequences can be created without connected equipment, which separates planning from the observing night. Planning at a desk and running at the observatory become two separate steps.
- Real-time adjustment
- Most parameters can be adjusted during sequence execution instead of stopping and restarting. This helps when clouds, focus drift or a filter change force an adjustment midway.
- Gmail notifications
- Optional notifications about the health, progress and status of a sequence go out through Gmail. The status messages leave through your own Google account, so no vendor server is described in between.
- Mosaics and framing
- Mosaics and framing appear as a product area on the homepage for targets larger than one frame. The homepage lists it as a product area, which suits wide-field or multi-panel targets.
How Sequence Generator Pro handles your data
The privacy page for the application says the Gmail access token used for optional notifications is stored on the local disk only. No retention period, hosting region or certification is stated on the pages read, and the pages do not say whether customer data trains AI models. Sequence Generator Pro runs on your computer, so images and sequences stay local unless you choose the Gmail notification option, which sends status messages through Google's service under your own account.
Where Sequence Generator Pro falls short in practice
- Yearly fee for updates. Updates and premium support need the subscription. The vendor says the installed version keeps working without one. Updates and premium support are what the yearly fee buys.
- Activation count. The annual fee changes with the number of simultaneous installs, from three to six, so multi-computer owners should price their own setup. The pages read show a range from three to six simultaneous installs.
- Import options. QSI and V2 import options are listed as not for sale on the product page, which may matter for people migrating old sequences. Check this on the product page before relying on it.
Works with
Alternatives to Sequence Generator Pro
Sequence Generator Pro: common questions
How much does Sequence Generator Pro cost?
As of November 2026 the product page shows a subscription from $149 for the first year and then $59 a year. The default option allows three simultaneous installs, and the annual fee varies with the activation count between three and six installs.
Do I need the subscription to keep using it?
No. The vendor says a subscription is not needed to keep using the installed version. The subscription covers software updates and premium support, so it matters mainly if you want newer releases or help from the vendor. The fee also covers premium support.
Can I build sequences without a telescope connected?
Yes. The about page says sequences can be built offline, without connected equipment. That lets you plan a night at a desk and then load the sequence at the observatory, with most parameters still adjustable in real time while it runs.
Does Sequence Generator Pro use AI?
The pages we read name no AI feature. The product is described as automation for night sky imaging that executes complex sequences of capture events. If you want a vendor that names AI, look at Voyager or StellarMate. Both are vendor descriptions.
What does the Gmail notification option send?
Optional Gmail notifications report the health, progress and status of a sequence, per the privacy page. The Gmail access token is stored on the local disk only, so the feature depends on your own Google account rather than a vendor server.