# IsonAI vs Tempus Fugit

The clearest difference is in-app purchases: IsonAI at none against Tempus Fugit's 4. Tempus Fugit's advantage is device support (4 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Tempus Fugit sells 4 in-app purchases, starting at $1.99 per 7 days. IsonAI asks for nothing beyond the download.

IsonAI ships an update fortnightly, Tempus Fugit weekly. The most recent releases landed on October 10, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | IsonAI | Tempus Fugit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (4 ratings)](https://appshunter.io/ios/app/tempus-fugit-pendulum-clock/id6770431075/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | — | Freemium |
| Size | 4 MB | 31 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple TV** |
| Age rating | 17+ | 4+ |
| Developer | [Dimas Wibisono](https://appshunter.io/developer/1892365235) | [Sunil Targe](https://appshunter.io/developer/1722898970) |

## What reviewers say

### IsonAI

[App page](https://appshunter.io/ios/app/isonai/id6761997078)

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

**In-app purchases:** none


### Tempus Fugit

[App page](https://appshunter.io/ios/app/tempus-fugit-pendulum-clock/id6770431075)

A beautifully designed pendulum clock app that offers a calming visual experience. It includes a Pomodoro focus timer with gentle chimes and customizable dial skins and numeral styles. Enjoy an immersive full-screen mode for distraction-free focus.

**Highlights:** 16 hand-designed dial skins, Pomodoro focus timer with bell chimes, Six numeral styles, Day-date complication, Smooth-sweep or tick-by-second motion, Hourly bell chime, Full-screen immersive mode

**Features:** Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tempus Pro Weekly | $1.99 | per 7 days |
| Tempus Pro Yearly | $9.99 | per year |
| Lifetime - GET 50% OFF | $14.99 | one-time |
| Tempus Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is IsonAI free?

IsonAI is free to download, with no in-app purchases.

### Is Tempus Fugit free?

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

### Do IsonAI or Tempus Fugit have ads?

Neither IsonAI nor Tempus Fugit shows ads.

### Which is updated more often, IsonAI or Tempus Fugit?

IsonAI ships an update fortnightly, and Tempus Fugit weekly. Most recently, IsonAI was updated on October 10, 2026 and Tempus Fugit on October 26, 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.*