# Flip Clock vs Summon

The clearest difference is update cadence: Flip Clock at every 3 days against Summon's monthly. Flip Clock also leads on iOS requirement (16.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Flip Clock sells 1 one-off in-app purchase and Summon sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Flip Clock ships an update every 3 days, Summon monthly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Flip Clock | Summon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/flip-clock-zen-focus-timer/id6762340795/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 2 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hai Nam Trinh](https://appshunter.io/developer/1139152400) | [Anand Raj R](https://appshunter.io/developer/514675684) |

## What reviewers say

### Flip Clock

[App page](https://appshunter.io/ios/app/flip-clock-zen-focus-timer/id6762340795)

Transform your device into a beautiful, distraction-free desk clock. This app offers a fullscreen flip clock experience with smooth animations, customizable themes, and built-in focus tools like Pomodoro timers. It's designed for deep concentration and quiet productivity, working fully offline without ads or tracking.

**Highlights:** Fullscreen flip clock with realistic animations, Built-in Pomodoro timer (Focus/Break/Cycles), Customizable themes and clock styles, Screen stays awake for desk use, Works fully offline, Subtle haptic feedback

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Premium | $1.99 | one-time |


### Summon

[App page](https://appshunter.io/ios/app/summon-meeting-alerts/id6781672445)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Summon Pro (Monthly) | $0.99 | per month |
| Summon Pro (Yearly) | $4.99 | per year |
| Summon Pro (Lifetime) | $9.99 | one-time |


## Frequently asked questions

### Is Flip Clock free?

Flip Clock is free to download, with in-app purchases available.

### Is Summon free?

Summon is free to download, with in-app purchases available.

### Do Flip Clock or Summon have ads?

Neither Flip Clock nor Summon shows ads.

### Which is updated more often, Flip Clock or Summon?

Flip Clock ships an update every 3 days, and Summon monthly. Most recently, Flip Clock was updated on November 5, 2026 and Summon on November 5, 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.*