# StampCalender vs マナーSOS

The clearest difference is ads: マナーSOS at none against StampCalender's shown. マナーSOS also leads on update cadence (every 10 days vs every 5 months). StampCalender's advantage is iOS requirement (15.6 vs 17.0). 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.

StampCalender ships an update every 5 months, マナーSOS every 10 days. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | StampCalender | マナーSOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/stampcalender/id459369355/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 53.2% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 9 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZAIZEN Co., Ltd.](https://appshunter.io/developer/380406945) | [SANWA Inc.](https://appshunter.io/developer/1878028373) |

## What reviewers say

### StampCalender

[App page](https://appshunter.io/ios/app/stampcalender/id459369355)

Organize your schedule with decorative stamps. Drag and drop stamps onto your calendar to mark appointments and events. Easily view your plans at a glance and prioritize important tasks.

**Highlights:** Drag-and-drop stamp scheduling, Visual calendar overview, Icon sorting for prioritization, Appointment planning, Schedule at a glance

**Features:** Vision Pro support

**In-app purchases:** none


### マナーSOS

[App page](https://appshunter.io/ios/app/sos/id6760735343)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is StampCalender free?

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

### Is マナーSOS free?

マナーSOS is free to download, with no in-app purchases.

### Do StampCalender or マナーSOS have ads?

StampCalender shows ads; マナーSOS does not.

### Which is updated more often, StampCalender or マナーSOS?

StampCalender ships an update every 5 months, and マナーSOS every 10 days. Most recently, StampCalender was updated on October 17, 2026 and マナーSOS on October 11, 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.*