dsoplanner.com

What It Is

DSO Planner is an Android astronomy observing planner and deep-sky charting app developed by amateur observers. It is not positioned as a general-purpose sky display app, but rather as a tool for real field-based visual observing: choosing targets, building lists, star hopping, and recording observations. Note that the scraped text does not show any AI, machine learning, or generative-model capabilities, so it should not be considered a typical AI application.

Core Capabilities

Its main strengths are its offline databases and observing workflow. The Pro version includes 113 million UCAC4 stars down to magnitude 16, along with extensive catalogs such as NGC/IC, SAC, UGC, PGC, comets, asteroids, double stars, and more. The planning tools can filter targets by observing site, sky conditions, equipment, time range, object type, size, magnitude, altitude, and visibility, and support up to 4 observing lists. On the charting side, it supports Telrad overlays, eyepiece/CCD field-of-view overlays, offline DSS image overlays, chart rotation/mirroring, magnitude display controls, and more. It also supports PushTo with Dobsonian setting circles, as well as Bluetooth GoTo control for Meade/Celestron controllers. Observing notes can be recorded as text or audio.

Pricing and Versions

The text shows four tiers: Free, Basic, Plus, and Pro. Free includes only the brightest targets and has functionality close to Basic; Basic has limited databases and features; Plus reduces the size of the UCAC4 and PGC datasets; Pro has the most complete data. Specific prices are not disclosed. Installation also has storage requirements: Pro needs at least 2GB of internal storage, Plus around 540MB, and Basic around 100MB.

Pros and Cons

Pros include a large database, strong offline capabilities, detailed observing filters, a night-friendly red mode, and one-hand/one-touch operation clearly optimized for field observing. It also supports importing lists from SkySafari and SkyTools. Cons include its complexity and steep learning curve for beginners; explicit support only for Android; relatively large storage usage; opaque pricing information; and no mention of Chinese-language support.

Who It’s For and Access from China

DSO Planner is best suited to astronomy enthusiasts who own a telescope, regularly do deep-sky visual observing, and need offline star charts plus observing-list management—especially Dobsonian or GoTo users. Access from mainland China is not explained in the source text. Downloads via Github or the Play Store may be uncertain in China, so availability is marked as unknown.