AstroFITS vs +Frames
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
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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
+Frames
This app helps astrophotographers plan their shots by providing a sky atlas, equipment-specific target recommendations, and field-of-view previews. It also offers an AI assistant for personalized advice and project tracking for deep-sky objects.
- Sky atlas with millions of stars and deep-sky objects
- Ranked target recommendations based on equipment and sky conditions
- True field-of-view preview for cameras and eyepieces
- Mosaic planning up to 4x4
- Project tracking for exposures and filters
- AI assistant for personalized astrophotography advice
- Augmented Reality (AR) mode for target location
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Clear night ahead? +Frames tells you what to shoot - and how to shoot it. THE ATLAS The whole sky in your pocket: ~12 million stars down to magnitude 14, 8,800 deep-sky objects, Sun, Moon and planets, asteroids, comets and 16,000 satellites moving live. Real astrophotos lie on the map, galaxies are drawn with their true orientation, and every object opens a card with the numbers that matter tonight. TONIGHT'S TARGETS, RANKED The Night tab scores every object for YOUR equipment, YOUR sky and YOUR horizon: altitude, moon distance, usable dark window, field-of-view fit. Grade A to E - the best target for tonight is always on top. FRAME IT True field-of-view preview for your camera or eyepiece. Rotate the frame, plan mosaics up to 4×4, check the sampling. An 8-sector horizon profile per site keeps trees and rooftops out of your plans. PROJECTS Track every target over nights: subs, exposure, gain, filter by filter. Camera angle and position are saved with the project and restored when you return. Export the plan in ASIAIR format. ASTRO BUDDY Your AI assistant knows your gear, your site and tonight's sky. Ask what to shoot, why a filter fits, how long to expose — computed from your sensor, your Bortle sky and the Moon. Type "I have a ZWO ASI2600MC" and he looks it up and saves it to your gear. AND MORE - Plate solving puts your own photos on the atlas - AR mode shows where a target sits in your real sky - Red night mode protects your dark adaptation - Calendar with moon phases and events, searchable up to 2050 - Works offline; no account, your data stays on your device (private iCloud backup) +Frames Premium unlocks the whole app - 7-day free trial. Languages: EN, DE, FR, ES, IT, PT, JA, KO, ZH, UK, RU, PL, TR. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ App terms: https://plus-frames.com/terms.html Privacy Policy: https://plus-frames.com/privacy.html
Screenshots
Verdict
The clearest difference is rating: +Frames at 5.0 against AstroFITS's 2.0. +Frames also leads on update cadence (every 8 days vs monthly). On price, ratings volume, ads and in-app purchases 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 and +Frames sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
+Frames holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
AstroFITS ships an update monthly, +Frames every 8 days. The most recent releases landed on September 21, 2026 and September 26, 2026 respectively.
| Parameter | AstroFITS | +Frames |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 1 | 1 |
| Update frequency | Monthly | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 61 MB | 743 MB |
| Age rating | 4+ | 4+ |
| Developer | yong chong loh | LEVIN GIDEON MERANER |
Customer experience
AstroFITS
+Frames
In-app purchases
AstroFITS
- Yearly Subscription$0.991 Year
+Frames
- Monthly7 Days trial$3.991 Month
- Yearly7 Days trial$29.991 Year









