Comparison

CallGuard vs Nextcloud Calendar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CallGuard

This app blocks unwanted calls at the system level before your phone rings. You create custom blocking rules for exact numbers, ranges, or prefixes, with advanced features like visual range editing and overlap detection. Your contacts are always protected, and all data processing is local for maximum privacy.

Highlights
  • System-level call blocking
  • Customizable blocking rules
  • Visual range editor
  • Contact protection
  • Overlap detection
  • iCloud sync
  • Statistics dashboard
Features
Read full description

CallGuard blocks unwanted calls at the system level using Apple's Call Directory Extension — before your phone even rings. YOU DECIDE WHAT TO BLOCK No pre-loaded spam lists. You create your own rules and only numbers you add are blocked. Nothing happens automatically. BLOCKING OPTIONS • Exact Number — Block a specific phone number • Range — Block all numbers within a range • Prefix — Block all numbers starting with a prefix KEY FEATURES • Visual Range Editor — Drag handles to adjust ranges with real-time feedback • Contact Protection — Your contacts are never blocked, even within a range • Overlap Detection — See which rules overlap and total numbers blocked • Capacity Tracking — Stay within Apple's 100K limit with visual indicators • Smart Auto-Sync — Rules sync automatically with intelligent debouncing • Sync Status — See exactly which rules are synced and which need updating • iCloud Sync — Optionally sync your rules across all your devices • Statistics Dashboard — Charts showing blocking activity and sync history • Live Activity — Track sync progress in Dynamic Island and Lock Screen PRIVACY • No account required • No data leaves your device • All processing is local • iCloud sync is optional and off by default Available in English, French, German, Spanish, and Chinese.

About

Nextcloud Calendar

Manage your Nextcloud calendars with a simple mobile app. View, create, and organize events with real-time synchronization across multiple instances. Supports creating meetings with video conference links.

Highlights
  • Automatic calendar detection
  • View, create, and manage events
  • Real-time synchronization
  • Multi-account support
  • Create meetings with video conference links
  • Switch between multiple Nextcloud instances
Read full description

Manage your Nextcloud calendars from a mobile app designed to keep things simple. Nextcloud Calendar automatically detects the calendars available on your instance and lets you easily view, create, and organize your events. Changes are synced in real time to keep your schedule up to date, whether you use one or multiple Nextcloud instances. Key features: • Automatic calendar detection • View, create, and manage events • Real-time synchronization • Multi-account support • Create meetings with video conference links via Nextcloud Talk Using multiple Nextcloud servers? Add your accounts and easily switch between instances. If Nextcloud Talk is enabled on your instance, you can generate a video conference link directly from the app and attach it to your event. Nextcloud Calendar is designed for users, teams, and organizations that want mobile access to their Nextcloud calendars through a clear, modern experience built for everyday use. A compatible Nextcloud instance is required. Some features may depend on your server configuration and the apps enabled by your administrator.

Screenshots

CallGuard4 screens
Nextcloud Calendar4 screens

Verdict

The call

The clearest difference is price: Nextcloud Calendar at Free against CallGuard's $4.99. Nextcloud Calendar also leads on iOS requirement (16.4 vs 18.0). On review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Nextcloud Calendar is free to download; CallGuard costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CallGuard ships an update every 9 days, Nextcloud Calendar every 2 weeks. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
CallGuard versus Nextcloud Calendar: the parameters behind the verdict, then further details
ParameterCallGuardNextcloud Calendar
Price$4.99Free — better
Rating—4.7 (3 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 9 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS18.016.4 — better
Further details — not scored
Size4 MB52 MB
Age rating4+4+
DeveloperAlexis CreuzotSoluce Technologies

Customer experience

CallGuard

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Nextcloud Calendar

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CallGuard

No in-app purchases

None

Nextcloud Calendar

No in-app purchases

Questions

Is CallGuard free?
CallGuard costs $4.99, with no in-app purchases.
Is Nextcloud Calendar free?
Nextcloud Calendar is free to download, with no in-app purchases.
Do CallGuard or Nextcloud Calendar have ads?
Neither CallGuard nor Nextcloud Calendar shows ads.
Which is updated more often, CallGuard or Nextcloud Calendar?
CallGuard ships an update every 9 days, and Nextcloud Calendar every 2 weeks. Most recently, CallGuard was updated on October 31, 2026 and Nextcloud Calendar on October 31, 2026.

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