# Nixie時計０ vs otta見守り人

The clearest difference is price: otta見守り人 at Free against Nixie時計０'s $0.99. otta見守り人 also leads on review sentiment (29% vs 0%) and update cadence (every 8 months vs every 22 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

otta見守り人 is free to download; Nixie時計０ costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Nixie時計０ ships an update every 22 months, otta見守り人 every 8 months. The most recent releases landed on October 9, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Nixie時計０ | otta見守り人 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | **29.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 8 months** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 16 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tetsuya Morikawa](https://appshunter.io/developer/728393868) | [otta inc.](https://appshunter.io/developer/966828927) |

## What reviewers say

### Nixie時計０

[App page](https://appshunter.io/ios/app/nixie/id870118824)

A retro-style clock app featuring Nixie tube-inspired displays for year, hour, minute, and second. It also includes an angle meter function for added utility.

**Highlights:** Nixie tube-style display, Year, hour, minute, second display, Angle meter function, Retro aesthetic

**Features:** Vision Pro support

**In-app purchases:** none


### otta見守り人

[App page](https://appshunter.io/ios/app/otta/id1590815925)

Become a "guardian" for your community's safety and security. Simply install and start the app to contribute to local safety during your daily commutes and outings. Your steps help ensure the safety of children and the elderly in your area.

**Highlights:** Contribute to local safety, GPS-based proximity reporting, Easy installation and activation, Supports children and elderly safety, No daily operation required

**In-app purchases:** none


## Frequently asked questions

### Is Nixie時計０ free?

Nixie時計０ costs $0.99, with no in-app purchases.

### Is otta見守り人 free?

otta見守り人 is free to download, with no in-app purchases.

### Do Nixie時計０ or otta見守り人 have ads?

Neither Nixie時計０ nor otta見守り人 shows ads.

### Which is updated more often, Nixie時計０ or otta見守り人?

Nixie時計０ ships an update every 22 months, and otta見守り人 every 8 months. Most recently, Nixie時計０ was updated on October 9, 2026 and otta見守り人 on September 16, 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.*