Comparison

Z21 vs SureWake

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

SureWake

Read full description

For when the built-in alarm isn't enough. SureWake is built on iOS 26's AlarmKit — the same system-level alarm engine the Clock app uses. Your alarm is scheduled by iOS itself, so it rings even if SureWake is closed, force-quit, or hasn't been opened in days. No background tricks, no battery drain. WHY IT RINGS • Scheduled by the system, not by the app. If the Clock app would ring, SureWake rings. • Backup rings are booked in advance. When your alarm goes off, up to two backups are already waiting in the system. Dismiss and doze off, and it rings again — with a stronger tone. • A Reliability page shows you exactly what's scheduled. You don't have to trust us; you can check. WAKE-UP CHECK Stopping the alarm isn't the same as being awake. After you stop it, SureWake gives you a few minutes to confirm you're up — or the backup rings. Pick how you confirm: • Tap — one big button. • Arithmetic — three quick problems. • Type — copy a sentence, no paste, no autocorrect. • Shake — fifteen good shakes and you're done. A countdown lives on the Lock Screen and in the Dynamic Island so you always know how long you have. Every method has an honest exit: if you're truly up, say so. YOUR MORNINGS, KEPT Every confirmed wake-up is a real system event, not a manual check-in. SureWake keeps a streak, your time-to-rise, and a calendar of your mornings. No badges, no points, no guilt notifications — just your own data, given back to you. SUNRISE ON YOUR TIMELINE See where sunrise falls relative to your alarm, computed offline from your time zone — no location permission needed. Allow your location once for a closer estimate. WHAT YOU'RE PAYING FOR Everything is free for 14 days. After that, one purchase unlocks it for good. Mostly, you're paying for things that aren't there. • No subscription. One purchase, yours forever. • No account. Nothing to sign up for. • No network of its own. SureWake itself never goes online; the only network activity is Apple's own purchase flow and rating prompt. • No ads, no analytics, no tracking. • No pets, no coins, no leaderboards. HONEST LIMITS • The ringing screen is iOS's own. We can't change how it looks, and the volume buttons will stop it — that's exactly why Wake-Up Check exists. • Alarm tones come from SureWake's built-in set (eight tones, three intensities). iOS doesn't allow importing your own music into system alarms. • Requires iOS 26.1 or later. SureWake is made by one person who overslept too many times. If it ever fails to ring, we want to know — support is a real inbox, and it gets read.

Screenshots

Z214 screens
SureWake4 screens

Verdict

The call

The clearest difference is update cadence: SureWake at every 3 days against Z21's every 3 weeks. Z21's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 26.1). 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 SureWake sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Z21 ships an update every 3 weeks, SureWake every 3 days. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
Z21 versus SureWake: the parameters behind the verdict, then further details
ParameterZ21SureWake
PriceFreeFree
Rating3.8 (13 ratings) — better—
Positive reviews38.3% of reviews—
Number of ratings13 — better—
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better26.1
Further details — not scored
Size232 MB11 MB
Age rating4+4+
DeveloperModelleisenbahn GmbH益平 林

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

SureWake

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Z21

One-time1
  • Z21 Full Version$17.99
1 purchases

SureWake

One-time1
  • Unlock SureWake$4.99

Questions

Is Z21 free?
Z21 is free to download, with in-app purchases available.
Is SureWake free?
SureWake is free to download, with in-app purchases available.
Do Z21 or SureWake have ads?
Neither Z21 nor SureWake shows ads.
Which is updated more often, Z21 or SureWake?
Z21 ships an update every 3 weeks, and SureWake every 3 days. Most recently, Z21 was updated on October 14, 2026 and SureWake on October 2, 2026.

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