Comparison

AstroFITS vs AstroOcular

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

Head to head
About

AstroFITS

This app allows users to quickly open and view FITS files on iOS devices using GPU acceleration. It features automatic image stretching and supports various color formats and bit depths, making astronomical image analysis more accessible.

Highlights
  • Open FITS files quickly on iOS
  • GPU accelerated image processing
  • Automatic image stretching
  • Supports RGB and gray color
  • Handles multiple BITPIX formats
  • Save adjusted images to Photos
Features
Read full description

A simple app to open FITS file in iOS quickly using GPU. It has an auto-stretch feature. And works on FITS file with RGB or gray color. It handles BITPIX of 8,16,32,-32 and -64. It is designed and tested for Seetar FITS file. It takes about 2 seconds to open and automatically stretch a 50mb FITS file. Sample links are provided below. Enjoy! Use: 1. Download your FITS file to your phone File directory. 2. Tap Image icon on the first top left. 3. Select your FITS file. 4. It will auto stretch. 5. Adjust the image level. 6. Adjust the image curve. 7. Tap the second top icon to save image to Photo. If you encounter an issue, please email to ustrainsit74@gmail.com with your FITS file as attachment. Sample: Below are some FITS files for download. - https://drive.google.com/file/d/1Li8f1QH1u1R6U8RKZZ0kwW9LZ4cHCaXz/view?usp=share_link - https://drive.google.com/file/d/1MVuW1oa7qAjbfdl_iGUI-q7knE2ij67v/view?usp=share_link - https://drive.google.com/file/d/1TE70gdDK3XmLx9-iB43I-uh6INq8FCaO/view?usp=share_link Privacy policy and term of use (EULA) is at https://deepskycolor.blogspot.com/2018/12/privacy-policy-for-deep-sky-color-app.html

About

AstroOcular

Features
Read full description

AstroOcular is a focused camera app for recording the Moon, planets, and observations through a telescope eyepiece. The app opens straight into the camera, avoids automatic lens switching by using physical rear cameras when available, and provides a visual guide to help center the iPhone on the eyepiece. Key features: - Photo and video capture through a telescope eyepiece - Physical rear lens selection - Automatic alignment guide and manual reticle fallback - Timer to reduce shake - Pro controls for zoom, focus, exposure, ISO, white balance, resolution, and FPS - Saves locally to the Photos library - No ads, analytics, purchases, or backend Video audio is off by default and microphone permission is requested only if you enable audio.

Screenshots

AstroFITS3 screens
AstroOcular4 screens

Verdict

The call

The clearest difference is in-app purchases: AstroOcular at none against AstroFITS's 1. 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. AstroFITS sells 1 in-app purchase, starting at $0.99 per year. AstroOcular asks for nothing beyond the download.

UpkeepUpdate frequency

AstroFITS ships an update monthly, AstroOcular every 5 weeks. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

Scorecard1 real difference · 8 level
AstroFITS versus AstroOcular: the parameters behind the verdict, then further details
ParameterAstroFITSAstroOcular
PriceFreeFree
Rating2.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size61 MB2 MB
Age rating4+4+
Developeryong chong lohAron Scolaro

In-app purchases

1 purchases

AstroFITS

Subscriptions1
  • Yearly Subscription$0.991 Year
None

AstroOcular

No in-app purchases

Questions

Is AstroFITS free?
AstroFITS is free to download, with in-app purchases available.
Is AstroOcular free?
AstroOcular is free to download, with no in-app purchases.
Do AstroFITS or AstroOcular have ads?
Neither AstroFITS nor AstroOcular shows ads.
Which is updated more often, AstroFITS or AstroOcular?
AstroFITS ships an update monthly, and AstroOcular every 5 weeks. Most recently, AstroFITS was updated on September 21, 2026 and AstroOcular on September 13, 2026.

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