# Zenther vs Delta Timer △

The clearest difference is rating: Delta Timer △ at 5.0 against Zenther's 3.7. Delta Timer △ also leads on in-app purchases (none vs 4) and iOS requirement (18.1 vs 26.0). Zenther's advantage is update cadence (every 4 days vs every 10 days) and ratings volume (3 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Zenther sells 4 in-app purchases, starting at $1.59 per 7 days. Delta Timer △ asks for nothing beyond the download.

Delta Timer △ holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Zenther ships an update every 4 days, Delta Timer △ every 10 days. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Zenther | Delta Timer △ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/zenther-ai-calorie-tracker/id6748252780/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/delta-timer/id6748762829/reviews)** |
| Number of ratings | **3** | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 10 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 12 MB |
| Requires iOS | 26.0 | **18.1** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Rudrank Riyam](https://appshunter.io/developer/1479784360) | [Thomas Delgado Dias](https://appshunter.io/developer/944281589) |

## What reviewers say

### Zenther

[App page](https://appshunter.io/ios/app/zenther-ai-calorie-tracker/id6748252780)

Intelligently track workouts, nutrition, and progress with personalized insights. This app prioritizes your privacy by processing all data on your device, offering a secure and user-friendly fitness companion.

**Highlights:** AI-powered fitness tracking, Private on-device data processing, Workout and nutrition logging, Personalized daily targets, Streak tracking and achievements, Home and lock screen widgets, Apple Health and Watch integration

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.59 | per 7 days |
| Monthly | $3.89 | per month |
| Annual | $28.49 | per year |
| Lifetime | $59.99 | one-time |


### Delta Timer △

[App page](https://appshunter.io/ios/app/delta-timer/id6748762829)

This interval timer app guides users through various training routines like HIIT and Tabata. It offers customizable workouts with adjustable exercise and rest periods, featuring a minimalist design with light and dark modes for focused training.

**Highlights:** Customizable workout creation, Adjustable exercise and rest durations, Minimalist, distraction-free interface, Light and dark modes, Supports HIIT, Tabata, EMOM, and circuits

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zenther free?

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

### Is Delta Timer △ free?

Delta Timer △ is free to download, with no in-app purchases.

### Which has better reviews, Zenther or Delta Timer △?

Delta Timer △ is rated higher. Zenther averages 3.7 out of 5 from 3 ratings, while Delta Timer △ averages 5.0 from 1 ratings.

### Do Zenther or Delta Timer △ have ads?

Neither Zenther nor Delta Timer △ shows ads.

### Which is updated more often, Zenther or Delta Timer △?

Zenther ships an update every 4 days, and Delta Timer △ every 10 days. Most recently, Zenther was updated on October 12, 2026 and Delta Timer △ on October 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.*