Comparison

Z21 vs ADHD Productivity Coach

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

Head to head
About

Z21

Control your model train layout and locomotives wirelessly from your iOS device. Manage your locomotive library, program digital components, and operate switches and signals with an intuitive touch interface. Enjoy a realistic train control experience with customizable driver cabs.

Highlights
  • Wireless control of locomotives and layout
  • Manage locomotive library with images
  • Program digital components
  • Intuitive graphic interface for switches and signals
  • Downloadable driver cabs for realistic control
  • Demo mode available
Features
Read full description

Use this app to connect to a Z21 Digital Center. A demo mode is available. With this app you can manage locomotive libraries, locomotives and locomotive functions, program digital components – and of course control all locomotives with DCC- or Motorola-decoder, as easy and convenient as is only possible with touch-technology. The digital switchboard Z21 connects your model train unit and your digital locomotives with your iOS device via WLAN. This way you can control the operation on your train layout easily and conveniently from your mobile device. Model train control was never this easy and convenient: With one swipe of your hand you can scroll to your model of choice in the locomotive library. A slight touch on the headlight symbol and the front and backlights go on. A second touch, this time on the speaker symbol, and the locomotive makes a sound. Drag your finger over the speed indicator and the train accelerates. The further highlights of the Z21-App • Control your entire layout with an intuitive, graphic interface and have easy access to the entire scope of functions of your digital locomotives. • Manage your entire locomotive-library in just one application, including individual locomotive images for an ideal overview. • Control the digital functions of your locomotives with intuitive function symbols instead of complicated key combinations. • Create a blueprint of your railway system and control your switches, signals and modules with a single click. • Download driver cabs and control your locomotives from a real train driver’s point of view.

About

ADHD Productivity Coach

Features
Read full description

Struggling to start? Losing focus halfway? Forgetting the habit you swore you'd keep? You're not lazy — your brain just works differently. ADHD Productivity Coach is built from the ground up for ADHD minds, turning overwhelm into momentum one tiny step at a time. Powered by on-device Apple Intelligence, your AI coach breaks scary tasks into 5-minute micro-steps, plans your day around your energy, and cheers you on when starting feels impossible — all privately, right on your iPhone. WHY ADHD BRAINS LOVE IT - Less overwhelm, more momentum — every big task becomes a list of tiny, doable steps - Works with your dopamine, not against it — see what actually fuels your focus - Gentle, shame-free design — soft visuals, no guilt, no cluttered to-do lists DAILY FOCUS PLANNER Start each day with an AI-prioritized plan. Tasks are ranked by urgency, importance, and how much energy they need, so you always know the one thing to do next. AI TASK BREAKDOWN Tap any overwhelming task and watch it split into bite-sized micro-steps you can actually begin. "Write the report" becomes five 5-minute wins. SMART, ADHD-FRIENDLY SCHEDULING Your AI coach time-blocks your day around your natural energy — hard tasks when you're sharp, easy wins for the afternoon slump, with built-in buffer time because transitions are hard. FOCUS TIMER Beautiful, distraction-free focus sprints (15, 25, 45, 50 min). Body-double your way through work and watch your focused minutes add up. DOPAMINE TRACKER Log what lifts you and what drains you. Over time, discover the movement, rewards, and rituals that genuinely refuel your brain. HABIT TRACKING & STREAKS Build routines that stick with satisfying streaks and a clean daily progress ring. Meds, movement, water, brain dumps — keep the chain going. PERSONALIZED AI COACHING Feeling stuck, tired, or scattered? Chat with a warm AI coach that validates how you feel and gives you one tiny next step — never a lecture. PRIVATE BY DESIGN The AI runs on-device with Apple Intelligence. Your tasks, moods, and habits stay yours. TRY IT FREE Start with a 7-day free trial, then just $9.99/month for unlimited AI coaching, smart scheduling, dopamine and focus analytics, and unlimited habits. Cancel anytime. Your ADHD isn't a flaw to fix — it's a brain to work with. Let's make today feel doable. — Subscription details: ADHD Coach Pro is $9.99/month with a 7-day free trial. Payment is charged to your Apple ID at confirmation of purchase. The subscription auto-renews unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Use of App : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Z214 screens
ADHD Productivity Coach4 screens

Verdict

The call

The clearest difference is device support: Z21 at 3 against ADHD Productivity Coach's 1. Z21 also leads on iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases 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. Z21 sells 1 one-off in-app purchase and ADHD Productivity Coach sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
Z21 versus ADHD Productivity Coach: the parameters behind the verdict, then further details
ParameterZ21ADHD Productivity Coach
PriceFreeFree
Rating3.8 (13 ratings) — better—
Positive reviews38.3% of reviews—
Number of ratings13 — better—
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size232 MB1 MB
Age rating4+4+
DeveloperModelleisenbahn GmbHhapy gohil

Bugs and requests

Z21

Reported bugs

17 issues
  • App crashes on startup (white screen issue)
  • Connection drops to Z21 central station
  • Throttle display shows incorrect or blank speeds
  • Function buttons not responding properly in multitraction mode
  • Route synchronization failures across multiple control station pages
Show 12 more
  • Weichen (turnout) display showing white/blank images
  • App freezes during speed adjustment
  • Export functionality crashes (PRO version)
  • Occupancy feedback not displaying (Roco 10808)
  • iOS 14+ compatibility issues
  • Slow response times and lag
  • Layout elements jumping off-screen when editing
  • Routes highlighting incorrectly or not at all
  • Password-protected bug report zip file inaccessible to users
  • Fleischmann turntable module not available
  • Bridge modules cannot be displayed diagonally
  • Data loss after app updates

Requested features

20 requests
  • Offline locomotive database access
  • Dark mode or customizable color schemes
  • Background image support for layout design
  • Turntable/rotary module support
  • Automatic event-based control (occupancy detection, crossing automation)
Show 15 more
  • Pendulum train control functionality
  • Manual route deactivation capability
  • Larger emergency stop button
  • Locomotive database sharing between layouts
  • Multi-language support (Spanish, French, Italian, Russian, Japanese)
  • Diagonal bridge module display
  • Camera locomotive integration
  • Double slip switch operation
  • Text labeling in layout designer
  • Improved signal image selection interface
  • Vehicle filtering and categorization system
  • Windows/Mac desktop application
  • Start-destination buttons for easier route control
  • Occupancy feedback module support (Roco 10808)
  • Copy and paste functionality in layout mode

ADHD Productivity Coach

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Z21

One-time1
  • Z21 Full Version$17.99
1 purchases

ADHD Productivity Coach

Subscriptions1
  • Pro Monthly7 Days trial$4.991 Month

Questions

Is Z21 free?
Z21 is free to download, with in-app purchases available.
Is ADHD Productivity Coach free?
ADHD Productivity Coach is free to download, with in-app purchases available.
Do Z21 or ADHD Productivity Coach have ads?
Neither Z21 nor ADHD Productivity Coach shows ads.

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