# FastOnce vs Maximus 1RM Calculator

The clearest difference is price: FastOnce at Free against Maximus 1RM Calculator's $0.49. Maximus 1RM Calculator's advantage is update cadence (daily vs every 6 days) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

FastOnce is free to download; Maximus 1RM Calculator costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

FastOnce ships an update every 6 days, Maximus 1RM Calculator daily. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | FastOnce | Maximus 1RM Calculator |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 days | **Daily** |
| Size | 6 MB | 22 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrii Zakharov](https://appshunter.io/developer/6779217338) | [DANIEL STEVEN MONTOYA ROJAS](https://appshunter.io/developer/6792053616) |

## What reviewers say

### FastOnce

[App page](https://appshunter.io/ios/app/fastonce-fasting-timer/id6780015850)

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

**In-app purchases:** none


### Maximus 1RM Calculator

[App page](https://appshunter.io/ios/app/maximus-1rm-calculator/id6792053614)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FastOnce free?

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

### Is Maximus 1RM Calculator free?

Maximus 1RM Calculator costs $0.49, with no in-app purchases.

### Do FastOnce or Maximus 1RM Calculator have ads?

Neither FastOnce nor Maximus 1RM Calculator shows ads.

### Which is updated more often, FastOnce or Maximus 1RM Calculator?

FastOnce ships an update every 6 days, and Maximus 1RM Calculator daily. Most recently, FastOnce was updated on September 9, 2026 and Maximus 1RM Calculator on September 20, 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.*