# UNITS MASTER vs Zolvy

The clearest difference is price: Zolvy at Free against UNITS MASTER's $6.99. Zolvy also leads on update cadence (every 11 days vs every 4 months) and rating (4.7 vs 4.3). UNITS MASTER's advantage is in-app purchases (none vs 2) and device support (4 vs 1). On review sentiment and ads there is nothing between them.

Zolvy is free to download; UNITS MASTER costs $6.99 up front. Zolvy sells 2 in-app purchases, starting at $14.99 per year. UNITS MASTER asks for nothing beyond the download.

Zolvy holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 6 and 29 respectively. Written reviews split almost evenly too, at 75% and 75% positive.

UNITS MASTER ships an update every 4 months, Zolvy every 11 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | UNITS MASTER | Zolvy |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/units-master/id1428926317/reviews) | **[4.7 (29 ratings)](https://appshunter.io/ios/app/zolvy-pocket-spreadsheet/id1620524037/reviews)** |
| Number of ratings | 6 | **29** |
| Positive reviews | 75.0% of reviews | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 11 days** |
| Monetization | Paid | **Freemium** |
| Size | 13 MB | 47 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Intemodino Group s.r.o.](https://appshunter.io/developer/557849644) | [Domnic Francis](https://appshunter.io/developer/757055072) |

## What reviewers say

### UNITS MASTER

[App page](https://appshunter.io/ios/app/units-master/id1428926317)

This app is a comprehensive unit conversion calculator for length, distance, and area. It supports a vast array of US and metric units, offering both fractional and decimal calculations with customizable rounding. Users can also perform complex mathematical operations and access a calculation history.

**Highlights:** Extensive US and metric unit support, Fractional and decimal calculations, Customizable rounding precision, Complex calculation capabilities, Calculation history and sharing, Multiple output formats

**Features:** Vision Pro support

**In-app purchases:** none


### Zolvy

[App page](https://appshunter.io/ios/app/zolvy-pocket-spreadsheet/id1620524037)

This app offers a mobile-friendly way to calculate, organize, and plan with numbers. It automates calculations and updates results instantly when numbers change, simplifying tasks like budgeting and forecasting.

**Highlights:** Instant automated calculations, Organized sheets with folders, Log numbers like expenses, Formulas with variables, Intuitive formula typing, iCloud backup, Export PDFs and CSVs

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited | $14.99 | per year |
| Unlimited Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is UNITS MASTER free?

UNITS MASTER costs $6.99, with no in-app purchases.

### Is Zolvy free?

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

### Which has better reviews, UNITS MASTER or Zolvy?

Zolvy is rated higher. UNITS MASTER averages 4.3 out of 5 from 6 ratings, while Zolvy averages 4.7 from 29 ratings.

### Do UNITS MASTER or Zolvy have ads?

Neither UNITS MASTER nor Zolvy shows ads.

### Which is updated more often, UNITS MASTER or Zolvy?

UNITS MASTER ships an update every 4 months, and Zolvy every 11 days. Most recently, UNITS MASTER was updated on October 25, 2026 and Zolvy 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.*