Comparison

PlanetEdit vs Zenith Annotation

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

Head to head
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

About

Zenith Annotation

Read full description

Study and present your astronomical images on iPhone and iPad. Zenith Annotation brings image import, astrometry, annotations, and presentation tools together in a guided workflow. Explore the field • Open the images you choose from Photos or Files, including TIFF and TIF images. • Solve a field online when you request it and agree to send a working copy. • Browse catalogs and review object and session details. Prepare your annotations • Organize layers, labels, data, and visual styles. • Keep project progress on your device. • Preserve the original file: online solving uses a reduced grayscale copy, not the original. Present your work • Design carousels with editable text, charts, palettes, and animations. • Arrange images and text in collages. • Export a result to save or share yourself. Online solving requires a connection and your explicit action. For this feature, the app sends Astrometry.net a reduced grayscale copy of up to 2048 pixels without EXIF metadata. Zenith Annotation does not transmit the original file or publish your images to social networks. Annotation Studio Choose how to start: try 14 days free if your Apple account is eligible, or pay for the year up front. The plan automatically renews after the trial at the price shown by your App Store; in Mexico, that price is MXN $549 per year. Direct payment charges the displayed annual price at the start. Manage or cancel renewal in your Apple account settings. Purchase restoration is included. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PlanetEdit2 screens
Zenith Annotation3 screens

Verdict

The call

The clearest difference is in-app purchases: PlanetEdit at none against Zenith Annotation's 2. Zenith Annotation's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, 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. Zenith Annotation sells 2 in-app purchases, starting at $24.99 per year. PlanetEdit asks for nothing beyond the download.

UpkeepUpdate frequency

PlanetEdit ships an update every 5 days, Zenith Annotation every 10 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
PlanetEdit versus Zenith Annotation: the parameters behind the verdict, then further details
ParameterPlanetEditZenith Annotation
PriceFreeFree
Rating4.5 (2 ratings) — better—
Positive reviews40.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 5 days — betterEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size24 MB47 MB
Age rating4+4+
Developeryong chong lohEduardo Martinez Gomez

In-app purchases

None

PlanetEdit

No in-app purchases

2 purchases

Zenith Annotation

Subscriptions2
  • Annotation Studio with Trial14 Days trial$24.991 Year
  • Annotation Studio Annual$24.991 Year

Questions

Is PlanetEdit free?
PlanetEdit is free to download, with no in-app purchases.
Is Zenith Annotation free?
Zenith Annotation is free to download, with in-app purchases available.
Do PlanetEdit or Zenith Annotation have ads?
Neither PlanetEdit nor Zenith Annotation shows ads.
Which is updated more often, PlanetEdit or Zenith Annotation?
PlanetEdit ships an update every 5 days, and Zenith Annotation every 10 days. Most recently, PlanetEdit was updated on November 9, 2026 and Zenith Annotation on October 31, 2026.

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