Comparison

Add Astra vs PlanetEdit

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

Head to head
About

Add Astra

Overlay accurate star positions onto your photos using image metadata and machine learning. The app intelligently identifies the sky to ensure stars are placed realistically, avoiding unwanted artifacts.

Highlights
  • Accurate star positioning
  • Uses Yale Bright Star Catalog
  • Extracts image metadata
  • Machine learning sky detection
  • Realistic star overlays
Features
Read full description

Add Astra was our first app. It uses the Yale Bright Star Catalog with extracted image metadata (date, time, location, orientation, and direction) to find star positions accurate to your uploaded image. Add Astra also uses the DETRResnet50SemanticSegmentationF16 Machine Learning Model to find the sky in your image, and only overlay the stars there, so you don’t have weird white dots all over your picture!

About

PlanetEdit

This app helps you process videos of planets, automatically cropping them to center the celestial body. It offers various image editing tools and advanced features like wavelet layers for detail extraction and denoising. You can also trim videos before stacking and save your edited images.

Highlights
  • Auto crop video to center planet
  • Basic image processing (stretch, saturation, brightness, contrast, hue)
  • Interactive stacking slider
  • Trim video before stacking
  • 5 wavelet layers for detail and denoising
  • Save edited images
Features
Read full description

AstroEdit Planet is a very simple 4in1 app to stack planetary video. It will automatically crop the video and center the planet. It works on video that has planet moving across the view or planet centred in the view. When you open the app, it auto loads a sample Saturn video. Tap Stack button to begin! PlanetEdit integrates the four legacy desktop software into a single delicate mobile app. Traditionally, astronomer has to install 4 different programs to process planetary video. They are (in process sequence): 1. PPIP for cropping video 2. AutoStakkert! for stacking frames 3. Registax for wavelet sharpening 4. Photoshop for RGB alignment and coloring Features: - Open video or image. Accept all format recognised by the Photo app. In addition, it open .ser files. First, copy them to the Files app. Then tap Open button in PlanetEdit app. Choose Open Files App. Tested for a 3.5Gb .ser file. Now for .avi file, copy to your the Photo app or the Files app. The .avi has to be the standard accepted by the Photo app. If it is accepted by the Photo app, it will be visible in the Photo app. - Auto crop video and center frame. - Auto set alignment points for stacking. - Lucky stacking slider. - Real time update of stacking result. - Use 2 finger to pinch zoom, 1 finger to drag and 1 finger to long press to compare a frame(best quality). - RGB alignment. - Basic image processing like saturation, bright, contrast and hue. - 5 wavelet layers to extract detail and denoise. - Save edited image to photo. PlnetEdit has been tested for video capture in seestar S30, S50 smart telescope, ZWO camera, refractive telescope 80mm and Dobson 200mm telescope. Email me at ustransit74@gmail.com if you need any assistance. Attached a short planet video file if necessary. Privacy policy and term of use (EULA) is at https://deepskycolor.blogspot.com/2018/12/privacy-policy-for-deep-sky-color-app.html

Screenshots

Add Astra2 screens
PlanetEdit2 screens

Verdict

The call

Add Astra and PlanetEdit both sit at 5.0 stars, but that hides the real split: 100% of Add Astra's written reviews are positive against 40% of PlanetEdit's. Add Astra also leads on update cadence (every 2 days vs every 5 days) and ratings volume (3 vs 1). PlanetEdit's advantage is in-app purchases (none vs 5). On price, rating, ads 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. Add Astra sells 5 in-app purchases, starting at $10.99 per month. PlanetEdit asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Add Astra against 5.0 for PlanetEdit. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews are what separate them: 100% of Add Astra's written reviews are positive against 40% of PlanetEdit's.

UpkeepUpdate frequency

Add Astra ships an update every 2 days, PlanetEdit every 5 days. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
Add Astra versus PlanetEdit: the parameters behind the verdict, then further details
ParameterAdd AstraPlanetEdit
PriceFreeFree
Rating5.0 (3 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews — better40.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 2 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size120 MB24 MB
Age rating4+4+
DeveloperAPParent LLCyong chong loh

Customer experience

Add Astra

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PlanetEdit

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

In-app purchases

5 purchases

Add Astra

Subscriptions1
  • 100 Credits a Month + No Ads$10.991 Month
One-time4
  • One Credit$0.29
  • Five Credits$0.99
  • Ten Credits$1.99
Show 1 more
  • 50 Credits$7.49
None

PlanetEdit

No in-app purchases

Questions

Is Add Astra free?
Add Astra is free to download, with in-app purchases available.
Is PlanetEdit free?
PlanetEdit is free to download, with no in-app purchases.
Which has better reviews, Add Astra or PlanetEdit?
Add Astra and PlanetEdit are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.
Do Add Astra or PlanetEdit have ads?
Neither Add Astra nor PlanetEdit shows ads.
Which is updated more often, Add Astra or PlanetEdit?
Add Astra ships an update every 2 days, and PlanetEdit every 5 days. Most recently, Add Astra was updated on October 24, 2026 and PlanetEdit on October 24, 2026.

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