# Lunar Flow vs SymptomLog

The clearest difference is in-app purchases: Lunar Flow at none against SymptomLog's 3. Lunar Flow also leads on iOS requirement (15.6 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. SymptomLog sells 3 in-app purchases, starting at $2.99 per month. Lunar Flow asks for nothing beyond the download.

## The numbers

| Metric | Lunar Flow | SymptomLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Daily |
| Size | 4 MB | 6 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ying Cao](https://appshunter.io/developer/1873612517) | [Sajith Lal m k](https://appshunter.io/developer/1680857165) |

## What reviewers say

### Lunar Flow

[App page](https://appshunter.io/ios/app/lunar-flow/id6758585214)

**Features:** macOS Compatibility

**In-app purchases:** none


### SymptomLog

[App page](https://appshunter.io/ios/app/symptomlog-illness-diary/id6774916416)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SymptomLog Monthly | $2.99 | per month |
| SymptomLog Annual | $14.99 | per year |
| SymptomLog Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is Lunar Flow free?

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

### Is SymptomLog free?

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

### Do Lunar Flow or SymptomLog have ads?

Neither Lunar Flow nor SymptomLog shows ads.

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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.*