# SiiAPP vs Caja15Mayo

The clearest difference is update cadence: SiiAPP at fortnightly against Caja15Mayo's monthly. SiiAPP also leads on iOS requirement (13.0 vs 15.0). On price, ads, 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.

SiiAPP ships an update fortnightly, Caja15Mayo monthly. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SiiAPP | Caja15Mayo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/siiapp/id1488201798/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 12.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free | — |
| Size | 61 MB | 72 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oscar Mendez Hernandez](https://appshunter.io/developer/1488201797) | [Caja Popular 15 de Mayo, S.C. de A.P. de R.L. de C.V.](https://appshunter.io/developer/1661589597) |

## What reviewers say

### SiiAPP

[App page](https://appshunter.io/ios/app/siiapp/id1488201798)

Easily access class schedules, teacher details, and professor reviews. View past academic cycles and customize your timetable. Offline access available for loaded information.

**Highlights:** Classroom and teacher lookup, Professor reviews and ratings, Customizable timetable design, Past academic cycle schedules, Offline access to data

**Features:** macOS Compatibility

**In-app purchases:** none


### Caja15Mayo

[App page](https://appshunter.io/ios/app/caja15mayo/id1661593746)

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

**In-app purchases:** none


## Frequently asked questions

### Is SiiAPP free?

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

### Is Caja15Mayo free?

Caja15Mayo is free to download, with no in-app purchases.

### Do SiiAPP or Caja15Mayo have ads?

Neither SiiAPP nor Caja15Mayo shows ads.

### Which is updated more often, SiiAPP or Caja15Mayo?

SiiAPP ships an update fortnightly, and Caja15Mayo monthly. Most recently, SiiAPP was updated on October 22, 2026 and Caja15Mayo on October 25, 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.*