# 懷舊日曆 vs Tomi dB

The clearest difference is review sentiment: Tomi dB at 100% against 懷舊日曆's 69%. Tomi dB also leads on price ($0.29 vs $5.99) and iOS requirement (13.0 vs 17.0.1). 懷舊日曆's advantage is update cadence (every 3 weeks vs every 14 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

懷舊日曆 costs $5.99 and Tomi dB $0.29 up front. Neither carries in-app purchases, so what you see is what you pay.

懷舊日曆 ships an update every 3 weeks, Tomi dB every 14 months. The most recent releases landed on November 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 懷舊日曆 | Tomi dB |
| --- | --- | --- |
| Price | $5.99 | **$0.29** |
| Rating | **[3.6 (11 ratings)](https://appshunter.io/ios/app/id407933070/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 69.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Monetization | Paid | Paid |
| Size | 116 MB | 5 MB |
| Requires iOS | 17.0.1 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Firm 13 Limited](https://appshunter.io/developer/294205351) | [翔宇 孟](https://appshunter.io/developer/1666443091) |

## What reviewers say

### 懷舊日曆

[App page](https://appshunter.io/ios/app/id407933070)

Experience traditional culture with this calendar app. It seamlessly syncs with your iPhone calendar, offers customizable views, and includes global holidays and traditional Chinese festivals. Explore historical dates from 1850 to 2150.

**Highlights:** Seamless iPhone calendar sync, Customizable event colors, Hide/show specific calendars, Global and traditional holidays, Historical date range (1850-2150), Multi-language support

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

**In-app purchases:** none


### Tomi dB

[App page](https://appshunter.io/ios/app/tomi-dbsound-decibel-meter/id6445875391)

This app visualizes sound levels with a cute, animated character that reacts to noise. It logs high-decibel events and provides historical analytics to help monitor and manage noise disturbances in various settings.

**Highlights:** Real-time cartoon feedback, Noise event tracker, Automatic logging of high-decibel events, Noise pattern identification, Historical noise analytics, Voice recording for noise control

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

**In-app purchases:** none


## Frequently asked questions

### Is 懷舊日曆 free?

懷舊日曆 costs $5.99, with no in-app purchases.

### Is Tomi dB free?

Tomi dB costs $0.29, with no in-app purchases.

### Do 懷舊日曆 or Tomi dB have ads?

Neither 懷舊日曆 nor Tomi dB shows ads.

### Which is updated more often, 懷舊日曆 or Tomi dB?

懷舊日曆 ships an update every 3 weeks, and Tomi dB every 14 months. Most recently, 懷舊日曆 was updated on November 1, 2026 and Tomi dB on October 12, 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.*