# ONE SMARTDIET vs Betterfly

The clearest difference is rating: ONE SMARTDIET at 4.7 against Betterfly's 3.6. ONE SMARTDIET also leads on iOS requirement (9.0 vs 15.0). Betterfly's advantage is ratings volume (14 vs 3). On price, review sentiment, update cadence 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.

ONE SMARTDIET holds the better App Store score, 4.7 against 3.6. Both are backed by a comparable volume of ratings — 3 and 14 respectively. Written reviews point the same way: 25% of ONE SMARTDIET's written reviews are positive against 24% of Betterfly's.

ONE SMARTDIET ships an update every 3 weeks, Betterfly fortnightly. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | ONE SMARTDIET | Betterfly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/one-smartdiet/id1169336602/reviews)** | [3.6 (14 ratings)](https://appshunter.io/ios/app/betterfly/id6450281976/reviews) |
| Number of ratings | 3 | **14** |
| Positive reviews | **25.0% of reviews** | 23.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 222 MB | 191 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [원소프트다임](https://appshunter.io/developer/1169336601) | [Burn to Give SpA](https://appshunter.io/developer/1436625422) |

## What reviewers say

### ONE SMARTDIET

[App page](https://appshunter.io/ios/app/one-smartdiet/id1169336602)

Measure your body composition using a portable device with four contact electrodes. It syncs with Apple Health Kit and provides detailed results to guide your training and diet adjustments.

**Highlights:** Body fat measurement, BIA technology, Apple Health Kit sync, Training and diet guidance, Accumulated measurement results

**Features:** Vision Pro support

**In-app purchases:** none


### Betterfly

[App page](https://appshunter.io/ios/app/betterfly/id6450281976)

This platform rewards healthy habits like exercise, hydration, and sleep with gift cards, discounts, and insurance benefits. Users can also donate to social causes and participate in challenges to improve their well-being and contribute to a better world.

**Highlights:** Rewards healthy habits, Earn gift cards and discounts, Expand insurance coverage, Donate to social causes, Participate in challenges, Track calories, hydration, sleep, and steps

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

**In-app purchases:** none


## Frequently asked questions

### Is ONE SMARTDIET free?

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

### Is Betterfly free?

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

### Which has better reviews, ONE SMARTDIET or Betterfly?

ONE SMARTDIET is rated higher. ONE SMARTDIET averages 4.7 out of 5 from 3 ratings, while Betterfly averages 3.6 from 14 ratings.

### Do ONE SMARTDIET or Betterfly have ads?

Neither ONE SMARTDIET nor Betterfly shows ads.

### Which is updated more often, ONE SMARTDIET or Betterfly?

ONE SMARTDIET ships an update every 3 weeks, and Betterfly fortnightly. Most recently, ONE SMARTDIET was updated on October 24, 2026 and Betterfly on October 23, 2026.

---

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