# 税金の壁ナビ vs 月収予測ナビ

The clearest difference is in-app purchases: 月収予測ナビ at none against 税金の壁ナビ's 2. 月収予測ナビ also leads on ads (none vs shown). 税金の壁ナビ's advantage is update cadence (every 3 days vs every 2 weeks) and iOS requirement (17.0 vs 26.2). On price and device support there is nothing between them.

Both are free to download. 税金の壁ナビ sells 2 one-off in-app purchases. 月収予測ナビ asks for nothing beyond the download.

税金の壁ナビ ships an update every 3 days, 月収予測ナビ every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | 税金の壁ナビ | 月収予測ナビ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 1 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [KUREHO](https://appshunter.io/developer/1884942706) | [Kenichi Kobayashi](https://appshunter.io/developer/1896621472) |

## What reviewers say

### 税金の壁ナビ

[App page](https://appshunter.io/ios/app/106/id6764667565)

Automatically prevents exceeding income thresholds by tracking monthly earnings. Optimized for students, part-time workers, and pensioners, it provides real-time alerts and detailed explanations of tax and social security implications. Your financial data stays on your device.

**Highlights:** Automatic income threshold tracking, Real-time alerts for exceeding limits, Optimized for students, part-time workers, and pensioners, On-device data processing for privacy, Detailed explanations of tax implications, Simulator for tax and social security calculations

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| Plus | $9.99 | one-time |


### 月収予測ナビ

[App page](https://appshunter.io/ios/app/id6768994992)

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

**In-app purchases:** none


## Frequently asked questions

### Is 税金の壁ナビ free?

税金の壁ナビ is free to download, with in-app purchases available.

### Is 月収予測ナビ free?

月収予測ナビ is free to download, with no in-app purchases.

### Do 税金の壁ナビ or 月収予測ナビ have ads?

税金の壁ナビ shows ads; 月収予測ナビ does not.

### Which is updated more often, 税金の壁ナビ or 月収予測ナビ?

税金の壁ナビ ships an update every 3 days, and 月収予測ナビ every 2 weeks. Most recently, 税金の壁ナビ was updated on October 25, 2026 and 月収予測ナビ 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.*