AstroFITS vs AstroOcular
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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
AstroOcular
Read full descriptionHide 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
Verdict
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
Both are free to download. AstroFITS sells 1 in-app purchase, starting at $0.99 per year. AstroOcular asks for nothing beyond the download.
AstroFITS ships an update monthly, AstroOcular every 5 weeks. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.
| Parameter | AstroFITS | AstroOcular |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Monthly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 61 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | yong chong loh | Aron Scolaro |
In-app purchases
AstroFITS
- Yearly Subscription$0.991 Year
AstroOcular
No in-app purchases









