# Synaptic Flow vs Daily Hydration Reminder

The clearest difference is ads: Daily Hydration Reminder at none against Synaptic Flow's shown. Daily Hydration Reminder also leads on update cadence (fortnightly vs every 39 months) and iOS requirement (13.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Synaptic Flow ships an update every 39 months, Daily Hydration Reminder fortnightly. The most recent releases landed on June 3, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Synaptic Flow | Daily Hydration Reminder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 39 months | **Fortnightly** |
| Size | 16 MB | 70 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [ZAINAB KICHOU AMANAD](https://appshunter.io/developer/1644291674) | [Hamza Shahzad](https://appshunter.io/developer/1724020498) |

## What reviewers say

### Synaptic Flow

[App page](https://appshunter.io/ios/app/synaptic-flow-brain-training/id1667108202)

**Features:** macOS Compatibility

**In-app purchases:** none


### Daily Hydration Reminder

[App page](https://appshunter.io/ios/app/daily-hydration-reminder/id6476277852)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Synaptic Flow free?

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

### Is Daily Hydration Reminder free?

Daily Hydration Reminder is free to download, with no in-app purchases.

### Do Synaptic Flow or Daily Hydration Reminder have ads?

Synaptic Flow shows ads; Daily Hydration Reminder does not.

### Which is updated more often, Synaptic Flow or Daily Hydration Reminder?

Synaptic Flow ships an update every 39 months, and Daily Hydration Reminder fortnightly. Most recently, Synaptic Flow was updated on June 3, 2026 and Daily Hydration Reminder on September 9, 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.*