# FastZen vs FastLine

The clearest difference is update cadence: FastZen at every 9 days against FastLine's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. FastZen sells 3 one-off in-app purchases and FastLine sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

FastZen ships an update every 9 days, FastLine monthly. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | FastZen | FastLine |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 13 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Dupin](https://appshunter.io/developer/1871474236) | [Moaath Othman](https://appshunter.io/developer/866641649) |

## What reviewers say

### FastZen

[App page](https://appshunter.io/ios/app/fastzen-fasting-routine/id6761484595)

This app helps you manage your fasting schedule with customizable timers and reminders. It offers a recurring weekly routine, a timer that remembers your progress, and a clear view of your active fast. Review your history and track your streaks, all while keeping your data private on your device.

**Highlights:** Customizable fasting schedules, Recurring weekly routine setup, Live Activities for active fast tracking, Detailed fasting history and streaks, No account, ads, or server sync, Custom Week one-time purchase

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $0.99 | one-time |
| Thanks | $2.99 | one-time |
| Support development | $4.99 | one-time |


### FastLine

[App page](https://appshunter.io/ios/app/fastline-fasting-timer/id6780896658)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| FastLine Pro | $19.99 | per year |
| FastLine Pro | $29.99 | one-time |


## Frequently asked questions

### Is FastZen free?

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

### Is FastLine free?

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

### Do FastZen or FastLine have ads?

Neither FastZen nor FastLine shows ads.

### Which is updated more often, FastZen or FastLine?

FastZen ships an update every 9 days, and FastLine monthly. Most recently, FastZen was updated on September 21, 2026 and FastLine on September 10, 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.*