# True Weight vs Interval Trainer

The clearest difference is price: Interval Trainer at Free against True Weight's $0.99. True Weight's advantage is update cadence (every 6 weeks vs every 15 months) and iOS requirement (9.3 vs 16.4). On ads, in-app purchases and device support there is nothing between them.

Interval Trainer is free to download; True Weight costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

True Weight ships an update every 6 weeks, Interval Trainer every 15 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | True Weight | Interval Trainer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.4 (39 ratings)](https://appshunter.io/ios/app/true-weight/id287941226/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | 81.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 15 months |
| Monetization | Free | — |
| Size | 2 MB | 40 MB |
| Requires iOS | **9.3** | 16.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [made-up software](https://appshunter.io/developer/287941229) | [Luke Taylor](https://appshunter.io/developer/1609194513) |

## What reviewers say

### True Weight

[App page](https://appshunter.io/ios/app/true-weight/id287941226)

This app helps you understand your true weight progress by smoothing out daily fluctuations. It provides insights to tune your diet and stay motivated for long-term results. Track years of data with customizable graphs and easy export options.

**Highlights:** Understand true weight progress, Daily energy surplus calculation, Record weight in multiple units, Store up to 20 years of data, Customizable graphs, Data backup and import

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Smooth and efficient interface
- 📊 Helpful weight tracking and visualization
- 🔄 Accurate 'true weight' calculation
- 💪 Motivating for weight loss/maintenance

**What reviewers complain about**

- 🐛 Crashes and compatibility issues with iOS updates
- 🔗 Lack of integration with other apps/services
- 📈 Limited customization and data views
- 💰 Outdated pricing/business model

**Reported bugs**

- Crashes when entering new weight data
- Withings scale integration no longer working
- Incorrect weight unit conversions

**Requested features**

- Add BMI tracking and visualization
- Integrate with Apple Health and other fitness apps
- Expand data history and customizable date ranges
- Introduce user profiles and multi-user support
- Add more weight measurement units and conversion options


### Interval Trainer

[App page](https://appshunter.io/ios/app/interval-trainer/id6477546684)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is True Weight free?

True Weight costs $0.99, with no in-app purchases.

### Is Interval Trainer free?

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

### Do True Weight or Interval Trainer have ads?

Neither True Weight nor Interval Trainer shows ads.

### Which is updated more often, True Weight or Interval Trainer?

True Weight ships an update every 6 weeks, and Interval Trainer every 15 months. Most recently, True Weight was updated on October 29, 2026 and Interval Trainer on October 27, 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.*