# SmartLabel vs ChangeUnits2

The clearest difference is price: SmartLabel at Free against ChangeUnits2's $0.99. SmartLabel also leads on ratings volume (97 vs 1) and iOS requirement (11.0 vs 15.6). ChangeUnits2's advantage is rating (5.0 vs 2.2) and update cadence (every 4 weeks vs every 3 months). On ads, in-app purchases and device support there is nothing between them.

SmartLabel is free to download; ChangeUnits2 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ChangeUnits2 holds the better App Store score, 5.0 against 2.2. That said, the two scores are not equally well evidenced: SmartLabel has 97 ratings behind it against 1, so its average is the more settled of the two.

SmartLabel ships an update every 3 months, ChangeUnits2 every 4 weeks. The most recent releases landed on June 11, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SmartLabel | ChangeUnits2 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [2.2 (97 ratings)](https://appshunter.io/ios/app/smartlabel/id1130429932/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/changeunits2/id1661260714/reviews)** |
| Number of ratings | **97** | 1 |
| Positive reviews | 11.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | **Free** | Paid |
| Size | 23 MB | 17 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Consumer Brands Association](https://appshunter.io/developer/1631888760) | [Jack McCormack](https://appshunter.io/developer/1658121467) |

## What reviewers say

### SmartLabel

[App page](https://appshunter.io/ios/app/smartlabel/id1130429932)

Access detailed product information for food, beverages, household goods, pet care, and personal care items. Scan barcodes or search for products to find ingredient definitions, sourcing practices, certifications, and more.

**Highlights:** Scan product UPC codes, Scan SmartLabel QR codes, Search specific products, View ingredient definitions, Access sourcing practices, Discover third-party certifications, Find sustainability information

**In-app purchases:** none


### ChangeUnits2

[App page](https://appshunter.io/ios/app/changeunits2/id1661260714)

This powerful utility app offers lightning-fast and accurate unit conversions for a wide range of needs. It includes advanced math functions, currency exchange, time zone tracking, and even chemical equation balancing. Designed for professionals and everyday users alike, it works offline and remembers your last calculations.

**Highlights:** Extreme speed and accuracy, Offline functionality, Currency exchange converter, Global time zone tracking, Advanced math functions, Chemical equation balancing, Last 33 calculations remembered

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartLabel free?

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

### Is ChangeUnits2 free?

ChangeUnits2 costs $0.99, with no in-app purchases.

### Which has better reviews, SmartLabel or ChangeUnits2?

ChangeUnits2 is rated higher. SmartLabel averages 2.2 out of 5 from 97 ratings, while ChangeUnits2 averages 5.0 from 1 ratings.

### Do SmartLabel or ChangeUnits2 have ads?

Neither SmartLabel nor ChangeUnits2 shows ads.

### Which is updated more often, SmartLabel or ChangeUnits2?

SmartLabel ships an update every 3 months, and ChangeUnits2 every 4 weeks. Most recently, SmartLabel was updated on June 11, 2026 and ChangeUnits2 on June 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*