Comparison

Zenther vs Delta Timer △

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Zenther

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
Read full description

**Your fitness journey, intelligently tracked and completely private.** Zenther helps you understand your workouts, nutrition, and progress with smart insights - all while keeping your data secure on your device. **COMPLETE FITNESS TRACKING** Sleep quality tracking with personalized recommendations. Daily steps and activity monitoring. Workout streak tracking with milestone celebrations. **NUTRITION MADE SIMPLE** Easy food logging with photo, voice, or manual entry. Smart macro tracking based on your fitness goals. Calorie balance tracking for weight management. Personalized daily targets that adapt to your activity. Progress tracking for weight loss, gain, or maintenance. **MOTIVATION THAT WORKS** Streak tracking with visual progress indicators. Personal record detection and achievements. Smart insights about your workout patterns. Contextual motivation based on your actual progress. Gentle reminders that respect your schedule. **BEAUTIFUL WIDGETS** 8 different widgets for quick access to your stats. Live workout data on your home screen and lock screen. Privacy-protected as the data is hidden when your phone is locked. Beautiful design that complements iOS. **YOUR DATA STAYS YOURS** Everything processed on your device and nothing sent to servers. No account required, no data collection. Full transparency about what we access. You control all permissions. **WORKS WITH YOUR APPLE DEVICES** It directly integrates with Apple Health and Apple Watch. Siri shortcuts for quick progress checks. Automatic sync across all your devices. Native iOS design that feels right at home. **FOR EVERYONE** Whether you are just starting out or training seriously, Zenther adapts to your level. Beginner-friendly with helpful guidance. Advanced analytics for serious athletes. Flexible goals that match your lifestyle. No judgment, just helpful insights like a partner. **SMART INSIGHTS** Instead of overwhelming you with data, Zenther highlights what matters. When you perform best during the week. Whether you are on track with your nutrition goals. Simple suggestions to improve your consistency. Download Zenther today and start your journey toward optimal health and fitness! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Delta Timer △

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
Read full description

Delta Timer is a simple yet powerful interval timer built to keep you focused during training. It helps guide your HIIT, Tabata, or any other interval-based workout with ease and precision. Whether it’s HIIT, Tabata, EMOM, strength circuits, or a custom routine, Delta Timer adapts to your rhythm — guiding you through every round. Check some of the Delta Timer features: Customizable workouts: Create and fine-tune your training structure — from quick Tabata bursts to complete circuit sessions. Adjust exercise, rest, warmup, cooldown, and round durations with ease. Minimal and intuitive design: A distraction-free interface that keeps you aware of every phase of your workout, even mid-movement. Light and Dark Modes: Train comfortably anywhere, with a look that adapts to your environment. Free and ad-free: All essential features are available for free. No subscriptions, no clutter.

Screenshots

Zenther3 screens
Delta Timer △4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 3 level
Zenther versus Delta Timer △: the parameters behind the verdict, then further details
ParameterZentherDelta Timer △
PriceFreeFree
Rating3.7 (3 ratings)5.0 (1 ratings) — better
Number of ratings3 — better1
Update frequencyEvery 4 days — betterEvery 10 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS26.018.1 — better
Further details — not scored
Size17 MB12 MB
Age rating4+4+
DeveloperRudrank RiyamThomas Delgado Dias

In-app purchases

4 purchases

Zenther

Subscriptions3
  • Weekly$1.597 Days
  • Monthly$3.891 Month
  • Annual$28.491 Year
One-time1
  • Lifetime$59.99
None

Delta Timer △

No in-app purchases

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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