+Frames vs Zenith Annotation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
+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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+Frames plans your night: what to shoot, when, and how. THE ATLAS The whole sky in your pocket: stars down to magnitude 21 when you zoom in, 8,800 deep-sky objects, Sun, Moon and planets, asteroids, comets and satellites moving live. Real astrophotos lie on the map, galaxies are drawn with their position angle, 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, field-of-view fit, filter fit, moon, usable dark window. Grade A to E, the best target for tonight is always on top. FRAME IT Field-of-view preview for your camera or eyepiece. Rotate the frame, plan mosaics up to 4x4, check the sampling, swap camera and telescope while the frame stays on screen. Compare up to 10 frames at once with +FOV. An 8-sector horizon profile per site keeps trees and rooftops out of your plans. PROJECTS Track every target over nights: hours target per filter, subs, exposure, gain, location. Camera angle and position are saved with the project. Export the plan in ASIAIR format or as a NINA target set. Observing log for stars, lucky imaging log for Sun, Moon and planets. ASTRO BUDDY Your assistant knows the whole app, your gear, your site and tonight's sky. It does the work from the chat: creates projects, logs your nights, saves gear and locations, opens any screen. Ask what to shoot, which filter fits, how long to expose. Name a device and it looks up the specs and saves it. New here? Type "tour". AND MORE Weather on every location: clouds, dew, rain and wind for the next three nights. Calendar with moon phases, moon-free nights, eclipses and showpiece targets at their best, searchable up to 2050. 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. Works offline; no account, your data stays on your device (private iCloud backup). +Frames Lite is free. Premium unlocks the whole app. 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
Zenith Annotation
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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
Verdict
The clearest difference is iOS requirement: Zenith Annotation at 15.0 against +Frames's 18.0. On price, update cadence, 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. +Frames sells 2 in-app purchases, starting at $3.99 per month and Zenith Annotation sells 2 in-app purchases, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.
+Frames ships an update every 2 weeks, Zenith Annotation every 10 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | +Frames | Zenith Annotation |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 748 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | LEVIN GIDEON MERANER | Eduardo Martinez Gomez |
In-app purchases
+Frames
- Monthly$3.991 Month
- Yearly$29.991 Year
Zenith Annotation
- Annotation Studio with Trial14 Days trial$24.991 Year
- Annotation Studio Annual$24.991 Year









