# hellocetus vs OraOrb

The clearest difference is iOS requirement: hellocetus at 15.0 against OraOrb's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

hellocetus ships an update monthly, OraOrb every 3 weeks. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | hellocetus | OraOrb |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 77 MB | 425 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Waitcle](https://appshunter.io/developer/1824924378) | [RoleNeo LLC](https://appshunter.io/developer/6776101831) |

## What reviewers say

### hellocetus

[App page](https://appshunter.io/ios/app/hellocetus-supermoon-calendar/id6759944569)

Track celestial events like supermoons, moon phases, and planet positions with this astronomy calendar. Plan observations, get local sun and moon times, and explore detailed sky data.

**Highlights:** Supermoon calendar with long-range dates, Daily moon phase and illumination tracking, Local sun and moon times, Planet position comparison, Save observation notes and reminders, Optional astronomy event alerts

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

**In-app purchases:** none


### OraOrb

[App page](https://appshunter.io/ios/app/oraorb/id6776101829)

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

**In-app purchases:** none


## Frequently asked questions

### Is hellocetus free?

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

### Is OraOrb free?

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

### Do hellocetus or OraOrb have ads?

Neither hellocetus nor OraOrb shows ads.

### Which is updated more often, hellocetus or OraOrb?

hellocetus ships an update monthly, and OraOrb every 3 weeks. Most recently, hellocetus was updated on October 14, 2026 and OraOrb on October 3, 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.*