Comparison

ZenRinger vs Kan Do

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

Head to head
About

ZenRinger

Easily manage incoming calls with one-tap control. Silence unknown callers to avoid spam or enable ringing for important contacts. Stay present and in control of your phone's availability.

Highlights
  • One-tap unknown caller blocking
  • Send unknown callers to voicemail
  • Quickly enable ringing for new contacts
  • Optional app badge and Live Activity status
  • Widget for current ringer status
  • Reminds you of current call status
Features
Read full description

Silence Spam — Answer Calls That Matter Tired of navigating through Settings every time you need to block unknown phone callers? ZenRinger puts Apple’s Unknown Caller blocking at your fingertips with simple one-tap control. Unknown callers are phone numbers not in your Contacts. Full Access is required for app functionality, available as an annual subscription with a free trial or a one-time lifetime purchase. Review Help -> Installation Guide, and app limitations in Help -> Troubleshooting before purchase. MINDFUL CALL MANAGEMENT Take a zen approach to your phone—stay present and focused when you need quiet, or instantly available when you’re expecting calls. HOW IT WORKS • Tap SILENCE to send unknown callers straight to voicemail • Tap RING when expecting calls from new numbers (doctor, plumber, delivery) • Optional app badge and Live Activity keep you informed of your current ringer status • Available widget shows current ringer status STAY IN CONTROL ZenRinger remembers your last setting and reminds you when calls are silenced or ringing (optional app setting), so you won’t miss important calls or get bombarded by spam. PERFECT FOR • Blocking robocalls and scam attempts during normal times • Quickly allowing all calls when expecting important callers not yet in your contacts • Peace of mind knowing your status at a glance SETTINGS NOTES ZenRinger uses Shortcuts to toggle between blocking and allowing unknown callers. Before first use, set Phone > Silence Unknown Callers to either “Never” or “Silence” (not “Ask”), as Shortcuts cannot change from the “Ask” option. If you prefer using the “Ask” option (where iOS prompts you for each unknown call), ZenRinger isn’t designed for your workflow. This app is built for people who want to quickly switch between blocking all unknown callers or letting them all through. ZenRinger tracks settings changed within the app. If you manually adjust Silence Unknown Callers directly in Settings, the app status may be out of sync until you next choose a setting in ZenRinger. SIMPLE SETUP After first launch, ZenRinger will walk you through downloading the Shortcuts needed to control your phone settings. ONE-TIME SETUP, EVERYDAY CONVENIENCE. Take back control of your phone. Download ZenRinger today. Terms of Use & End User License Agreement (EULA): https://zenringer.com/terms-of-service/ Privacy Policy: https://zenringer.com/privacy-policy/

About

Kan Do

Organize your work with customizable Kanban boards and detailed task management. Capture notes, attach files, and set reminders for deadlines. Syncs seamlessly across all your Apple devices via iCloud.

Highlights
  • Kanban boards with drag-and-drop
  • Rich markdown notes editor
  • File and image attachments
  • iCloud sync across Apple devices
  • Smart lists (Inbox, Today, Upcoming)
  • Customizable task details
Features
Currently charting
Read full description

Organize your work into Spaces and Projects, then move tasks across the columns you define. Every card shows what matters at a glance: a cover image, subtitle, tags, priority, and due date. Open any task and you get a full markdown notes editor with headings, lists, checkboxes, images, and file attachments. ORGANIZE YOUR WAY • Kanban boards with drag-and-drop cards, columns, and dividers • A list view for every project, with drag to reorder • Spaces group your projects; tags cut across them • Smart lists for Inbox, Today, Upcoming, and Flagged • Archive completed work, or keep it crossed out on the board CAPTURE THE DETAILS • Rich notes on every task: headings, bold, lists, to-do checkboxes, quotes, and code • Attach images and files right in the note • Cover images, subtitles, priorities, flags, links, and due dates with reminders EVERYWHERE YOU WORK • Native on Mac, iPhone, iPad, and Apple Vision Pro • iCloud sync keeps every device up to date • Spotlight search and Shortcuts actions! • Multi-select to move, complete, or delete tasks in bulk • Light and Dark appearance, color themes, adjustable typography No accounts. No subscriptions to manage your own tasks. Your data lives in your iCloud.

Screenshots

ZenRinger4 screens
Kan Do4 screens

Verdict

The call

The clearest difference is price: ZenRinger at Free against Kan Do's $2.99. ZenRinger also leads on rating (5.0 vs 4.5) and iOS requirement (18.6 vs 26.0). Kan Do's advantage is in-app purchases (none vs 1) and update cadence (every 2 days vs every 3 months). On 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

CostPrice · In-app purchases · Ads · Monetization

ZenRinger is free to download; Kan Do costs $2.99 up front. ZenRinger sells 1 one-off in-app purchase. Kan Do asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ZenRinger holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Kan Do has 20 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

ZenRinger ships an update every 3 months, Kan Do every 2 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard9 real differences · 2 level
ZenRinger versus Kan Do: the parameters behind the verdict, then further details
ParameterZenRingerKan Do
PriceFree — better$2.99
Rating5.0 (2 ratings) — better4.5 (20 ratings)
Positive reviews—82.5% of reviews
Number of ratings220 — better
Update frequencyEvery 3 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#63 — better
DevicesiPhoneiPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — better
Requires iOS18.6 — better26.0
Further details — not scored
Size17 MB64 MB
Age rating4+4+
DeveloperData Management Solutions LLCStephen Robles

Customer experience

ZenRinger

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Kan Do

All ratings20 ratings
Positive90.0%
Neutral5.0%
Negative5.0%
Written reviews40 reviews
Positive82.5%
Neutral5.0%
Negative12.5%

In-app purchases

1 purchases

ZenRinger

One-time1
  • Lifetime$9.99
None

Kan Do

No in-app purchases

Questions

Is ZenRinger free?
ZenRinger is free to download, with in-app purchases available.
Is Kan Do free?
Kan Do costs $2.99, with no in-app purchases.
Which has better reviews, ZenRinger or Kan Do?
ZenRinger is rated higher. ZenRinger averages 5.0 out of 5 from 2 ratings, while Kan Do averages 4.5 from 20 ratings.
Do ZenRinger or Kan Do have ads?
Neither ZenRinger nor Kan Do shows ads.
Which is updated more often, ZenRinger or Kan Do?
ZenRinger ships an update every 3 months, and Kan Do every 2 days. Most recently, ZenRinger was updated on October 31, 2026 and Kan Do on November 6, 2026.

Other comparisons