CalendarTV vs OneOpen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalendarTV
Enhance your standard iCal with a beautiful, customizable calendar design. Ideal for wall-mounted displays in homes or companies, it ensures you never miss important events like agreements, holidays, or birthdays.
- iCal to Apoino design conversion
- Automatic updates for new events
- Smart clock functionality
- Selectable event categories
- Customizable start day of the week
- Multilingual support (8 languages)
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CalendarTV makes it easy to keep the whole family in sync. See the month ahead on one calm, clear shared iPad screen. Designed for the home, CalendarTV keeps today’s plans visible in the kitchen, hallway or living room. With CalendarTV, you can: - View the month in a large, easy-to-read calendar - Show calendars from your iPad and choose exactly which ones appear - Keep track of birthdays, events and everyday family plans - Add five personal photos above the days of the week - See a live clock, date, week numbers and your selected month in one place - Personalise fonts, text sizes, day boxes, photos, language and the first day of the week - Choose light or dark mode and a 12- or 24-hour clock - Open a larger view of a day’s events with a single tap CalendarTV is a shared place for family overview — simple enough for every day and flexible enough to feel at home in yours
OneOpen
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OneOpen is a multi-format file viewer for iPhone and iPad. Open documents, web pages, CAD drawings, 3D models and archives from Files, Mail and apps that support document sharing. HTML and Markdown Preview HTML, HTM and XHTML pages. Read Markdown / MD notes with headings, a table of contents, tables, code fences, task lists, footnotes and reference links. ZIP websites retain local images, styles and relative resources. Markdown in packages can display supported local images. Ordinary HTML allows restricted HTTPS/WSS networking by default, with offline and Safe Preview options. Markdown does not run scripts or load remote images. CAD drawings and 3D models (Advanced) • Pan, zoom and toggle layers in supported DWG/DXF 2D model-space drawings. • Rotate STEP/STP, IGES/IGS, BREP/BRP, STL, OBJ and PLY models, including PLY vertex colors and point clouds. • ZIP a complete OBJ model folder to load supported MTL materials, PNG/JPEG textures, normals, transparency and groups. A standalone OBJ shows geometry without reading private neighboring files. • Preview supported static GLB / glTF 2.0 geometry, nodes, basic materials and PNG/JPEG textures. Model ZIPs retain relative resources. JSON and model information have separate views. • USDZ starts in object view; choose AR when needed. • Included models and engineering drawings demonstrate supported features. Everyday viewing is free Read PDF, Office/iWork, images, audio/video, JSON, XML, YAML, CSV, code and text. PDF supports continuous reading, zoom, search and page controls that hide while scrolling. Edit supported text in an independent working copy. Archives and EPUB Browse ZIP, 7Z, RAR, TAR, GZ, BZ2, XZ and supported TAR combinations. Open or share supported entries and save extracted files to Files. ZIP and EPUB remain free; other archive formats require Advanced Access. EPUB follows the declared chapter order, with a table of contents, previous/next controls, current-chapter search and reading settings. Pages stay offline. A chapter error keeps navigation available. DRM, media overlays, annotations and whole-book search are unsupported. Email, certificates and information Decode EML headers, body text, common character encodings and attachment filenames. Open or share readable attachments independently. HTML email becomes text without loading remote content. Decryption, signature verification and TNEF extraction are not provided. Inspect public CER, DER, CRT and PEM certificate subjects, issuers, validity, algorithms, public keys, usages and SHA-256 fingerprints. Certificates are never installed and device trust is not evaluated. File Information includes PDF metadata, image/camera properties, media tracks, text encoding/line counts and archive summaries. Open from other apps Skippable onboarding uses real iOS screenshots to explain More, Edit and favorite ordering in the share sheet. Revisit it in Settings. Categories, Recents and widgets help you return to files. Advanced Access and compatibility An annual membership or a one-time lifetime purchase unlocks the same specialized features. Check format details before purchasing. DWG supports selected 2D model-space content; DXF supports text files. CAD editing, engineering measurement, native SolidWorks and full external references are unsupported. Compressed glTF geometry, skins and active morphs require conversion. Animation is static; advanced materials may be approximate. ZIP complete model folders, or use self-contained GLB for single-file sharing. Supported AES/ZipCrypto ZIPs prompt for passwords; unsupported encryption/compression, multipart and RAR3 solid are excluded. Native previews depend on iOS codecs/variants. Privacy No account, ads, analytics or document uploads. Non-HTML previews stay offline. HTML and ZIP websites may run JavaScript and connect over HTTPS/WSS in an isolated environment; offline and Safe Preview modes are available. Terms: https://oneapps.studio/terms Privacy: https://oneapps.studio/privacy
Screenshots
Verdict
The clearest difference is price: OneOpen at Free against CalendarTV's $14.99. OneOpen also leads on update cadence (every 3 days vs every 4 months). CalendarTV's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement 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
OneOpen is free to download; CalendarTV costs $14.99 up front. OneOpen sells 2 in-app purchases, starting at $0.99 per year. CalendarTV asks for nothing beyond the download.
CalendarTV ships an update every 4 months, OneOpen every 3 days. Both last shipped on October 24, 2026.
| Parameter | CalendarTV | OneOpen |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 2.7 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 4 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPad, Apple TV | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Oliver Copenhagen ApS | Freedom Dimension (shenzhen) Technology Co., Ltd |
In-app purchases
CalendarTV
No in-app purchases
OneOpen
- Advanced Access Annual$0.991 Year
- Advanced Access Lifetime$2.99









