# TrueFast vs Onefast

The clearest difference is update cadence: Onefast at every 2 days against TrueFast's every 6 days. TrueFast's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. TrueFast sells 6 in-app purchases, starting at $2.99 per month and Onefast sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

TrueFast ships an update every 6 days, Onefast every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | TrueFast | Onefast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/truefast/id6762436547/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 6 MB | 4 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Evan Mattson](https://appshunter.io/developer/1887047359) | [Nguyen Dinh Chung](https://appshunter.io/developer/6805296065) |

## What reviewers say

### TrueFast

[App page](https://appshunter.io/ios/app/truefast/id6762436547)

Track your intermittent fasting journey with a clean, ad-free interface. Monitor your progress, set personalized goals, and access educational content. Offers seamless integration with Apple Watch and Lock Screen widgets for easy access.

**Highlights:** Fasting timer with elapsed and remaining time, Saved goals for common fasting plans, Schedules and reminders, History calendar, streaks, and badges, Lock Screen widgets and Apple Watch support, Fasting phase education, Local-first data storage

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrueFast Pro Monthly | $2.99 | per month |
| TrueFast Pro Yearly | $19.99 | per year |
| Buy Us a Coffee | $1.99 | one-time |
| Power the Fast | $4.99 | one-time |
| Super Supporter | $9.99 | one-time |
| TrueFast Pro (Lifetime) | $29.99 | one-time |


### Onefast

[App page](https://appshunter.io/ios/app/onefast-fasting-timer/id6810987516)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Onefast Pro (Yearly) | $9.99 | per year |
| Onefast Pro (Lifetime) | $19.99 | one-time |


## Frequently asked questions

### Is TrueFast free?

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

### Is Onefast free?

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

### Do TrueFast or Onefast have ads?

Neither TrueFast nor Onefast shows ads.

### Which is updated more often, TrueFast or Onefast?

TrueFast ships an update every 6 days, and Onefast every 2 days. Most recently, TrueFast was updated on October 31, 2026 and Onefast on October 31, 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.*