Comparison

SDO Viewer vs ScopeBoss

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

Head to head
About

SDO Viewer

Access and view the latest images from the Solar Dynamics Observatory. Receive push notifications when new images become available, keeping you updated on solar activity.

Highlights
  • Download SDO images
  • Display latest solar images
  • Push notifications for new images
  • Courtesy of NASA/SDO science teams
Features
Read full description

SDO Viewer is a simple application for downloading and displaying the latest images taken by the Solar Dynamics Observatory (SDO). It includes push notifications so you can be notified by a badge on the application when new images are available. SDO Viewer, by the creator of SoHO Viewer. Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.

About

ScopeBoss

Control your Meade LX200GPS telescope remotely using your iPhone or iPad. This app emulates the Autostar II controller, offering convenient access to telescope functions through intuitive tabs for slewing, object catalogs, and custom buttons.

Highlights
  • Emulates Autostar II controller
  • WiFi-to-Serial adapter communication
  • Keypad and Slew control tabs
  • Gesture-based slewing
  • Customizable function buttons
  • Object catalogs with over 21,000 entries
  • Micro focuser control
Read full description

ScopeBoss emulates the Autostar II controller for Meade LX200GPS telescopes. It communicates with the scope through a WiFi-to-Serial adapter, such as the SkyFi by Southern Stars or the GC Wi-Fi Adapter, and provides complete control from iPhone or iPad. Using your telescope has never been so simple, convenient and reliable. ScopeBoss arranges the Autostar II functionality into logical, convenient tabs, making important but hard-to-find operations immediately accessible. Keypad Tab The Keypad Tab provides the LCD display and the primary keypad buttons (minus slew arrows, which are found on their own separate tab) of the real, Autostar II hand-box controller. Most LX200GPS users will find much functionality here familiar, including numeric keys for data entry and hot button short cuts, as well as scrolling arrows for object and option lists. The Enter, Mode, and Go To keys provide their full Autostar II functionality, including long presses for syncing, displaying or entering RA/Dec coordinates, and initiating spiral searches. "Flipping" to the back side of the Keypad tab reveals the Connection tab. Connection between the iPhone or iPad’s WiFi and the scope’s WiFi-to-Serial adapter is established in this tab. Input fields permit specification of the adapter’s specific IP Address and port number. Slew Tab Manually slewing the scope is performed in the Slew Tab. The primary slewing method uses Up, Down, Left and Right arrow buttons in the same manner as the real Autostar II. In addition, segmented switches provide control of the slew speed, as well as the ability to reverse slewing direction to match the optical system. “Flipping” to the back side of the tab reveals a second, gesture-based slewing method. This method uses finger drag gestures to slew the scope. In addition, a third method slews the scope according to the tip and tilt of the iPhone or iPad. Btn/Menu Tab This tab makes much of the operation of the LX200GPS easier and more accessible. The front side of the tab provides customizable buttons for important functions such as Alignment methods, Parking, Initializing, Guided Tours and more. The back side presents the entire operation menu of the Autostar II in an expandable/collapsible table. This operation menu can be imported directly from the scope, or the default menu can be used. Catalogs Tab This tab provides a choice of two star catalogs and one Messier catalog, totaling over 21,000 objects. Each catalog is displayed in a scrollable, searchable table. Tapping on an object in the table displays additional object information and offers the option to Go To the object or add it to Favorites. More… Additional convenience functions are provided in the More… tab. Features include, displaying current coordinates or slewing to input coordinates (RA/Dec, Alt/Az), controlling the Meade micro focuser, entering manual commands, setting the scope from iPhone or iPad location and time, and more.

Screenshots

SDO Viewer4 screens
ScopeBoss4 screens

Verdict

The call

The clearest difference is rating: ScopeBoss at 4.0 against SDO Viewer's 3.0. SDO Viewer's advantage is update cadence (every 2 months vs every 33 months). On price, ratings volume, ads and in-app purchases 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.

ReceptionRating · Positive reviews · Number of ratings

ScopeBoss holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 6 respectively.

UpkeepUpdate frequency

SDO Viewer ships an update every 2 months, ScopeBoss every 33 months. The most recent releases landed on June 1, 2026 and September 16, 2026 respectively.

Scorecard2 real differences · 8 level
SDO Viewer versus ScopeBoss: the parameters behind the verdict, then further details
ParameterSDO ViewerScopeBoss
PriceFreeFree
Rating3.0 (5 ratings)4.0 (6 ratings) — better
Positive reviews60.0% of reviews—
Number of ratings56 — better
Update frequencyEvery 2 months — betterEvery 33 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size6 MB19 MB
Age rating4+4+
DeveloperJerome DiazLodewijk Bonebakker

Customer experience

SDO Viewer

All ratings5 ratings
Positive20.0%
Neutral60.0%
Negative20.0%
Written reviews10 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

ScopeBoss

All ratings6 ratings
Positive66.7%
Neutral16.7%
Negative16.7%

In-app purchases

None

SDO Viewer

No in-app purchases

None

ScopeBoss

No in-app purchases

Questions

Is SDO Viewer free?
SDO Viewer is free to download, with no in-app purchases.
Is ScopeBoss free?
ScopeBoss is free to download, with no in-app purchases.
Which has better reviews, SDO Viewer or ScopeBoss?
ScopeBoss is rated higher. SDO Viewer averages 3.0 out of 5 from 5 ratings, while ScopeBoss averages 4.0 from 6 ratings.
Do SDO Viewer or ScopeBoss have ads?
Neither SDO Viewer nor ScopeBoss shows ads.
Which is updated more often, SDO Viewer or ScopeBoss?
SDO Viewer ships an update every 2 months, and ScopeBoss every 33 months. Most recently, SDO Viewer was updated on June 1, 2026 and ScopeBoss on September 16, 2026.

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