# zaCalc2 vs hpstr

The clearest difference is rating: hpstr at 5.0 against zaCalc2's 4.7. hpstr also leads on update cadence (every 2 months vs every 4 months). zaCalc2's advantage is device support (4 vs 2) and iOS requirement (15.6 vs 17). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

hpstr holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

zaCalc2 ships an update every 4 months, hpstr every 2 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | zaCalc2 | hpstr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (3 ratings)](https://appshunter.io/ios/app/zacalc2/id896310723/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/hpstr/id1534927560/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 6 MB | 5 MB |
| Requires iOS | **15.6** | 17 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [STEVEN HOLL](https://appshunter.io/developer/896310726) | [Bahram Atefi](https://appshunter.io/developer/1727944354) |

## What reviewers say

### zaCalc2

[App page](https://appshunter.io/ios/app/zacalc2/id896310723)

This app assists in calculating precise pizza dough ratios, including sourdough or yeast amounts. It offers advanced features like yeast regression formulas based on fermentation time and temperature, and scales toppings for any pizza size. Users can also customize their own recipes and ratios.

**Highlights:** Pizza dough ratio calculation, Sourdough/yeast amount calculation, Yeast regression formulas, Topping scaling by weight, Customizable recipes and ratios, Apple Watch support

**Features:** macOS Compatibility

**In-app purchases:** none


### hpstr

[App page](https://appshunter.io/ios/app/hpstr/id1534927560)

Find local happy hours, events, and shows at various venues. Explore different neighborhoods to discover new spots and activities.

**Highlights:** Discover happy hours, Find local events, Locate shows, Explore neighborhoods, Discover new spots

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

**In-app purchases:** none


## Frequently asked questions

### Is zaCalc2 free?

zaCalc2 is free to download, with no in-app purchases.

### Is hpstr free?

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

### Which has better reviews, zaCalc2 or hpstr?

hpstr is rated higher. zaCalc2 averages 4.7 out of 5 from 3 ratings, while hpstr averages 5.0 from 3 ratings.

### Do zaCalc2 or hpstr have ads?

Neither zaCalc2 nor hpstr shows ads.

### Which is updated more often, zaCalc2 or hpstr?

zaCalc2 ships an update every 4 months, and hpstr every 2 months. Most recently, zaCalc2 was updated on October 24, 2026 and hpstr on October 20, 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.*