Comparison

Star Stacker vs VIZTALAB

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

Head to head
About

Star Stacker

Create stunning star trail images and time-lapse videos from sequences of night sky photos. Offers various effects like full trails, faded trails, shooting stars, and warp mode. Supports importing photos from your device's gallery.

Highlights
  • Create star trail images
  • Generate time-lapse videos
  • Full trails effect
  • Faded trails effect
  • Shooting star effect
  • Warp mode effect
  • Import photos from gallery
Features
Read full description

Star Stacker allows you to import a sequence of star photos taken throughout the night and turn them into star trail images or a time lapse video. After importing you can create the images and/or a time-lapse video with a few different effects. - Full trails - every star at full brightness - Faded trails - Stars get brighter as the process runs - Shooting star - Like faded trails but the last image is brighter than any previous giving a shooting star effect - Javelin - Both ends of the trail are faded - Warp mode - zooms into the image stack slowly creating a warped effect. This will also affect the foreground so post processing may be required if the images have the foreground included. You can also choose to save a video of the time-lapse based on the options used for the image stacking. Can import images from your photos app. RAW files that have been recently imported from an SD card reader, may take a few minutes before the full resolution files are available. There are resolution limits depending on the device being used and the memory it has: - 6gb - 62mp - 5gb - 62mp - 4gb - 62mp - 3gb - 42mp - 2gb - 30mp

About

VIZTALAB

Features
Read full description

Experience the universe like never before. This app is designed to work seamlessly with our custom-built telescope, transforming your iPhone into a powerful tool for astronomical observation and deep space imaging.

Screenshots

Star Stacker4 screens
VIZTALAB4 screens

Verdict

The call

The clearest difference is price: VIZTALAB at Free against Star Stacker's $3.99. VIZTALAB also leads on update cadence (every 2 weeks vs every 2 months). Star Stacker's advantage is device support (3 vs 1). On ads, in-app purchases and iOS requirement 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

VIZTALAB is free to download; Star Stacker costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Star Stacker ships an update every 2 months, VIZTALAB every 2 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
Star Stacker versus VIZTALAB: the parameters behind the verdict, then further details
ParameterStar StackerVIZTALAB
Price$3.99Free — better
Rating4.3 (99 ratings) — better—
Positive reviews56.9% of reviews—
Number of ratings99 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS17.016.6 — better
Further details — not scored
Size4 MB176 MB
Age rating4+4+
Developermichael webbXingshi (Ningbo) Technology Co., Ltd

Bugs and requests

Star Stacker

Reported bugs

12 issues
  • App crashes when starting stack
  • App crashes when attempting to stack
  • App crashes during stacking process
  • App crashes when rendering video
  • Cannot load photos
Show 7 more
  • Cannot enter the app
  • Cannot select photos after choosing specific access
  • App crashes at nearly 90%
  • App crashes after stacking completes
  • App crashes on MacBook Pro
  • App crashes when trying to stack images
  • App crashes when adding images

Requested features

12 requests
  • Option to export live photos
  • Help info for stacking options
  • Manual stacking option
  • Advanced editing software
  • Automatic alignment function
Show 7 more
  • Ability to set picture format
  • Support for .raw files
  • Ability to import from Files app
  • Option to select all photos
  • Clear all option
  • 4K video export
  • Chinese language support

VIZTALAB

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Star Stacker

No in-app purchases

None

VIZTALAB

No in-app purchases

Questions

Is Star Stacker free?
Star Stacker costs $3.99, with no in-app purchases.
Is VIZTALAB free?
VIZTALAB is free to download, with no in-app purchases.
Do Star Stacker or VIZTALAB have ads?
Neither Star Stacker nor VIZTALAB shows ads.
Which is updated more often, Star Stacker or VIZTALAB?
Star Stacker ships an update every 2 months, and VIZTALAB every 2 weeks. Most recently, Star Stacker was updated on October 29, 2026 and VIZTALAB on October 28, 2026.

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