# SeeBox vs Instant Cal

The clearest difference is ads: SeeBox at none against Instant Cal's shown. SeeBox also leads on iOS requirement (11.0 vs 15.0). Instant Cal's advantage is update cadence (every 2 weeks vs monthly). On price, in-app purchases and device support there is nothing between them.

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

SeeBox ships an update monthly, Instant Cal every 2 weeks. The most recent releases landed on October 12, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | SeeBox | Instant Cal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 112 MB | 31 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Shenzhen Jikeyuan Electronic Technology Co., LTD](https://appshunter.io/developer/1818979411) | [Taek Oh](https://appshunter.io/developer/1616205954) |

## What reviewers say

### SeeBox

[App page](https://appshunter.io/ios/app/seebox/id6746926400)

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

**In-app purchases:** none


### Instant Cal

[App page](https://appshunter.io/ios/app/instant-cal/id6772655662)

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

**In-app purchases:** none


## Frequently asked questions

### Is SeeBox free?

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

### Is Instant Cal free?

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

### Do SeeBox or Instant Cal have ads?

Instant Cal shows ads; SeeBox does not.

### Which is updated more often, SeeBox or Instant Cal?

SeeBox ships an update monthly, and Instant Cal every 2 weeks. Most recently, SeeBox was updated on October 12, 2026 and Instant Cal on October 20, 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.*