# Puff Log vs Katana

The clearest difference is review sentiment: Katana at 100% against Puff Log's 43%. Katana also leads on rating (5.0 vs 3.6) and in-app purchases (none vs 5). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Puff Log sells 5 in-app purchases, starting at $5.99 per 7 days. Katana asks for nothing beyond the download.

Katana holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 43% of Puff Log's written reviews are positive against 100% of Katana's.

Puff Log ships an update every 2 weeks, Katana every 2 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Puff Log | Katana |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (5 ratings)](https://appshunter.io/ios/app/puff-log/id6723900229/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/katana-knife-collection/id6794938474/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 42.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Freemium | **Free** |
| Size | 22 MB | 19 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | +17 | 4+ |
| Developer | [Tech Arm Softwares](https://appshunter.io/developer/1756634584) | [ADAM DAVID LOWENSTEIN](https://appshunter.io/developer/6794938476) |

## What reviewers say

### Puff Log

[App page](https://appshunter.io/ios/app/puff-log/id6723900229)

This app helps users track their vaping habits, reduce nicotine intake, and work towards quitting. It offers features like puff logging, trend analysis, and customizable quit plans, all designed for iOS users.

**Highlights:** Seamless puff tracking, Insightful trend analysis, Customizable quit plan, Personal vaping journal, Timely notifications, Data security and privacy

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Puff Log weekly Save | $5.99 | per 7 days |
| Puff Log Pro | $5.99 | per month |
| puff log Pro Quarterly | $24.99 | per 3 months |
| Puff Log saver | $29.99 | per year |
| puff log pro yearly | $59.99 | per year |


### Katana

[App page](https://appshunter.io/ios/app/katana-knife-collection/id6794938474)

Organize your knife collection, record details, and explore the craft behind Japanese and kitchen knives. Discover makers, steels, and regions with research tools. Connect with other enthusiasts and share your passion.

**Highlights:** Organize knife collection, Record maker, steel, dimensions, Explore Japanese knife research, Add knives manually or import, Connect with other enthusiasts, Optional social sharing

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

**In-app purchases:** none


## Frequently asked questions

### Is Puff Log free?

Puff Log is free to download, with in-app purchases available.

### Is Katana free?

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

### Which has better reviews, Puff Log or Katana?

Katana is rated higher. Puff Log averages 3.6 out of 5 from 5 ratings, while Katana averages 5.0 from 3 ratings.

### Do Puff Log or Katana have ads?

Neither Puff Log nor Katana shows ads.

### Which is updated more often, Puff Log or Katana?

Puff Log ships an update every 2 weeks, and Katana every 2 days. Most recently, Puff Log was updated on October 30, 2026 and Katana on November 6, 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.*