# LockFast vs Water Reminder

The clearest difference is ads: LockFast at none against Water Reminder's shown. Water Reminder's advantage is iOS requirement (15.0 vs 26.2). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. LockFast sells 3 in-app purchases, starting at $3.99 per 7 days and Water Reminder sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

LockFast ships an update every 5 days, Water Reminder every 10 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | LockFast | Water Reminder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 10 days |
| Size | 1 MB | 44 MB |
| Requires iOS | 26.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Wood](https://appshunter.io/developer/1889641577) | [TUGBA GOKCEK](https://appshunter.io/developer/6786047130) |

## What reviewers say

### LockFast

[App page](https://appshunter.io/ios/app/lockfast/id6761440367)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Annual | $49.99 | per year |
| LifeTime | $149.99 | one-time |


### Water Reminder

[App page](https://appshunter.io/ios/app/water-reminder-smart-tracker/id6789913186)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sipling Pro | $0.99 | per month |
| Sipling Pro Lifetime | $5.99 | one-time |


## Frequently asked questions

### Is LockFast free?

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

### Is Water Reminder free?

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

### Do LockFast or Water Reminder have ads?

Water Reminder shows ads; LockFast does not.

### Which is updated more often, LockFast or Water Reminder?

LockFast ships an update every 5 days, and Water Reminder every 10 days. Most recently, LockFast was updated on October 31, 2026 and Water Reminder on November 6, 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.*