# Winnow vs AcidLog

Winnow and AcidLog are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Winnow sells 2 in-app purchases, starting at $4.99 per month and AcidLog sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Winnow ships an update monthly, AcidLog every 3 weeks. The most recent releases landed on October 18, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Winnow | AcidLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 48 MB | 45 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PsyFi Technologies](https://appshunter.io/developer/1859462854) | [DJUMP, MB](https://appshunter.io/developer/1861303154) |

## What reviewers say

### Winnow

[App page](https://appshunter.io/ios/app/winnow-cbt-journal/id6760937535)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Winnow Pro Monthly | $4.99 | per month |
| Winnow Pro Annual | $39.99 | per year |


### AcidLog

[App page](https://appshunter.io/ios/app/acidlog-reflux-trigger-diary/id6790413892)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is Winnow free?

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

### Is AcidLog free?

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

### Do Winnow or AcidLog have ads?

Neither Winnow nor AcidLog shows ads.

### Which is updated more often, Winnow or AcidLog?

Winnow ships an update monthly, and AcidLog every 3 weeks. Most recently, Winnow was updated on October 18, 2026 and AcidLog on September 26, 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.*