Shared Calendar vs Spectrum Studios
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Shared Calendar
Easily share daily repeating patterns with others. Ideal for managing work shifts, custody schedules, or any recurring events. Invitees can view or edit based on set permissions, with notifications for changes and a full audit trail.
- Daily repeating patterns
- Share with multiple users
- Customizable permissions
- Push notifications
- Full audit trail
- Web interface
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Shared Calendar (formally Custody Calendar) is a simple one entry per day shared calendar application. You can store a daily pattern against each Shared Calendar to store your work shifts, child custody days or any other repeating pattern. Once added a calendar can be shared with as many people as you like. You can email or SMS invites to others who can view the calendar on the web or iPhone App. You can set permissions for people you invite to read only, read-write or read-write and invite others. Shared Calendar can be used by anyone who needs to share a calendar ( but is especially useful for managing a childs schedule when the parents are no longer together). • background app refresh keeps always up to date • push notifications when entries are changed • annotate each day with a repeating schedule (child with mum / dad, working days, nights etc...) • full audit trail, see who changed what, no more misunderstandings! • web interface, use the shared calendar even without an iPhone • search your calendars • optimised for all iPhone screen sizes
Spectrum Studios
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The Spectrum Studios mobile app is for clients of tenant businesses to book appointments, communicate, confirm and pay for hair, nail, and massage services provided by the business owners that reside in a location.
Screenshots
Verdict
The clearest difference is in-app purchases: Spectrum Studios at none against Shared Calendar's 2. Spectrum Studios also leads on device support (3 vs 1) and iOS requirement (11.0 vs 16.0). Shared Calendar's advantage is update cadence (every 9 days vs every 55 months). On price and ads 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. Shared Calendar sells 2 one-off in-app purchases. Spectrum Studios asks for nothing beyond the download.
Shared Calendar ships an update every 9 days, Spectrum Studios every 55 months. The most recent releases landed on October 12, 2026 and September 25, 2026 respectively.
| Parameter | Shared Calendar | Spectrum Studios |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (124 ratings) — better | — |
| Positive reviews | 61.3% of reviews | — |
| Number of ratings | 124 — better | — |
| Update frequency | Every 9 days — better | Every 55 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Dorada App Software Ltd | WG FULL SERVICE SALON SUITES LLC |
In-app purchases
Shared Calendar
- 1 Year Ad Free Shared Calendar$1.99
- Single Calendar$4.99
Spectrum Studios
No in-app purchases
Questions
Is Shared Calendar free?
Is Spectrum Studios free?
Do Shared Calendar or Spectrum Studios have ads?
Which is updated more often, Shared Calendar or Spectrum Studios?
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