# Trinki vs Waterd

The clearest difference is iOS requirement: Trinki at 18.5 against Waterd's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Trinki sells 4 one-off in-app purchases and Waterd sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Trinki ships an update every 5 days, Waterd every 3 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Trinki | Waterd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/waterd/id6761774902/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 11 MB | 11 MB |
| Requires iOS | **18.5** | 26.0 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Noel Weinberg](https://appshunter.io/developer/1823665034) | [Wenjie Zhang](https://appshunter.io/developer/1891409645) |

## What reviewers say

### Trinki

[App page](https://appshunter.io/ios/app/trinki-water-reminder-tracker/id6748217192)

This app calculates your personalized daily water intake goal based on your body and environmental factors. It provides smart, timely reminders to help you stay hydrated and includes a map of public drinking fountains.

**Highlights:** Personalized hydration goals, Weather-aware goal adjustments, Smart, adaptive reminders, Fountain map for Germany, Progress tracking, Offline functionality

**Features:** Family Sharing, Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Espresso | $1.99 | one-time |
| Cappuccino | $3.99 | one-time |
| Trinki Pro | $3.99 | one-time |
| Coffee & Cake | $5.99 | one-time |


### Waterd

[App page](https://appshunter.io/ios/app/waterd/id6761774902)

This app automatically sets personalized daily water intake goals based on activity and weather, using on-device AI. It offers quick logging via widgets and notifications, with weekly insights for reflection. All data remains private and on your device.

**Highlights:** AI-powered personalized hydration goals, On-device processing for privacy, Quick logging via widgets and notifications, Weekly hydration insights, HealthKit integration, No ads or tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Waterd Premium | $1.99 | per month |
| Waterd Premium | $4.99 | per year |
| Waterd Premium Lifetime | $7.99 | one-time |


## Frequently asked questions

### Is Trinki free?

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

### Is Waterd free?

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

### Do Trinki or Waterd have ads?

Neither Trinki nor Waterd shows ads.

### Which is updated more often, Trinki or Waterd?

Trinki ships an update every 5 days, and Waterd every 3 days. Most recently, Trinki was updated on October 30, 2026 and Waterd on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*