# zakuni Calculator vs Smart Spam Filter

The clearest difference is in-app purchases: zakuni Calculator at none against Smart Spam Filter's 2. zakuni Calculator also leads on update cadence (every 2 weeks vs monthly). Smart Spam Filter's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Smart Spam Filter sells 2 in-app purchases, starting at $2.99 per month. zakuni Calculator asks for nothing beyond the download.

zakuni Calculator ships an update every 2 weeks, Smart Spam Filter monthly. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | zakuni Calculator | Smart Spam Filter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (9 ratings)](https://appshunter.io/ios/app/smart-spam-filter/id6503603784/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 98.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 44 MB | 22 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Kunio Ozawa](https://appshunter.io/developer/972274154) | [Junbum Lee](https://appshunter.io/developer/1749481503) |

## What reviewers say

### zakuni Calculator

[App page](https://appshunter.io/ios/app/zakuni-calculator/id1465087955)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Spam Filter

[App page](https://appshunter.io/ios/app/smart-spam-filter/id6503603784)

This AI-powered application automatically filters unwanted spam and smishing messages. It utilizes advanced AI models, both online and on-device, to detect and block new types of fraudulent texts in real-time. Additional features include custom blacklisting and whitelisting for enhanced control.

**Highlights:** AI-based spam/smishing filtering, Online real-time AI detection, On-device AI learning, Keyword and number blocking, Whitelist functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy a cup of coffee per month | $2.99 | per month |
| Support a chicken per year | $29.99 | per year |


## Frequently asked questions

### Is zakuni Calculator free?

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

### Is Smart Spam Filter free?

Smart Spam Filter is free to download, with in-app purchases available.

### Do zakuni Calculator or Smart Spam Filter have ads?

zakuni Calculator shows ads; Smart Spam Filter does not.

### Which is updated more often, zakuni Calculator or Smart Spam Filter?

zakuni Calculator ships an update every 2 weeks, and Smart Spam Filter monthly. Most recently, zakuni Calculator was updated on November 3, 2026 and Smart Spam Filter on November 8, 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.*