# ZenRinger vs Kan Do

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.

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.

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.

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.

## The numbers

| Metric | ZenRinger | Kan Do |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zenringer/id6759412185/reviews)** | [4.5 (20 ratings)](https://appshunter.io/ios/app/kan-do-project-management/id6795152195/reviews) |
| Number of ratings | 2 | **20** |
| Positive reviews | — | 82.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#47** |
| Size | 17 MB | 64 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Data Management Solutions LLC](https://appshunter.io/developer/1861346563) | [Stephen Robles](https://appshunter.io/developer/826544306) |

## What reviewers say

### ZenRinger

[App page](https://appshunter.io/ios/app/zenringer/id6759412185)

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:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $9.99 | one-time |


### Kan Do

[App page](https://appshunter.io/ios/app/kan-do-project-management/id6795152195)

**Currently charting:** #47 Top Paid · Productivity (US App Store)

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:** Apple Watch app, iPhone Duo support

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*