# Calibrate vs ThruFlow

The clearest difference is in-app purchases: ThruFlow at none against Calibrate's 1. ThruFlow also leads on update cadence (weekly vs fortnightly) and device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Calibrate sells 1 one-off in-app purchase. ThruFlow asks for nothing beyond the download.

Calibrate ships an update fortnightly, ThruFlow weekly. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Calibrate | ThruFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 4 MB | 16 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Warren Peters](https://appshunter.io/developer/1591974619) | [EDUARD SHCHIGOLEV](https://appshunter.io/developer/6798609193) |

## What reviewers say

### Calibrate

[App page](https://appshunter.io/ios/app/calibrate-time-block-planner/id6758213974)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calibrate Pro — Lifetime | $9.99 | one-time |


### ThruFlow

[App page](https://appshunter.io/ios/app/thruflow/id6798609191)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calibrate free?

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

### Is ThruFlow free?

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

### Do Calibrate or ThruFlow have ads?

Neither Calibrate nor ThruFlow shows ads.

### Which is updated more often, Calibrate or ThruFlow?

Calibrate ships an update fortnightly, and ThruFlow weekly. Most recently, Calibrate was updated on October 25, 2026 and ThruFlow on October 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.*