# AoToRoBo vs Approximationist World Clock

The clearest difference is price: AoToRoBo at Free against Approximationist World Clock's $0.99. AoToRoBo also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (15.1 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

AoToRoBo is free to download; Approximationist World Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AoToRoBo ships an update fortnightly, Approximationist World Clock every 2 months. The most recent releases landed on September 19, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | AoToRoBo | Approximationist World Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/approximationist-world-clock/id6762967230/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Paid |
| Size | 65 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Casstime Technologies Co., Ltd.](https://appshunter.io/developer/1238561221) | [OTI Technologies](https://appshunter.io/developer/321416742) |

## What reviewers say

### AoToRoBo

[App page](https://appshunter.io/ios/app/aotorobo/id6761795151)

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

**In-app purchases:** none


### Approximationist World Clock

[App page](https://appshunter.io/ios/app/approximationist-world-clock/id6762967230)

This app simplifies understanding global time zones with a focus on approximations rather than exact minutes. It helps users quickly see if a time is suitable for others worldwide, making coordination easier for remote teams, travelers, and families.

**Highlights:** Approximation-first time zone display, Compare multiple cities at a glance, Quick overlap spotting for availability, Human-friendly time descriptions, Time slider functionality, Export/import and share team info

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

**In-app purchases:** none


## Frequently asked questions

### Is AoToRoBo free?

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

### Is Approximationist World Clock free?

Approximationist World Clock costs $0.99, with no in-app purchases.

### Do AoToRoBo or Approximationist World Clock have ads?

Neither AoToRoBo nor Approximationist World Clock shows ads.

### Which is updated more often, AoToRoBo or Approximationist World Clock?

AoToRoBo ships an update fortnightly, and Approximationist World Clock every 2 months. Most recently, AoToRoBo was updated on September 19, 2026 and Approximationist World Clock on July 8, 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.*