Comparison

ZT vs StarLine 2

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

Head to head
About

ZT

Connect with incarcerated individuals through a comprehensive mobile service. Send letters, photos, make audio/video calls, and transfer funds. Offers entertainment options like puzzles and games to enrich communication.

Highlights
  • Send electronic letters and photos
  • Make audio and video calls
  • Transfer money to inmate accounts
  • Add puzzles and games to letters
  • Instant printing at correctional facilities
Features
Read full description

ZT — крупнейший сервис для поддержания общения с заключенными и осужденными в России. Все услуги в одном приложении: от письма до видеовызова. Электронные письма Отправляйте текстовые письма, цветные или чёрно-белые фотографии через приложение. Моментальная печать в учреждении, проверка цензором от 1 до 3 дней. К письму можно добавить раскраски, японские кроссворды, судоку, оригами и шахматные задачи. Это поможет вашему близкому провести время с пользой. Аудио и видео вызовы Общайтесь голосом или по видео через мобильное приложение. Аудиовызовы в приложении дешевле сотовой связи до 48% в зависимости от региона. Видеовызовы в ZT доступны только в приложении. Денежные переводы Переводите деньги на личный счёт осужденного, чтобы он мог купить всё необходимое в магазине учреждения. Перевод доходит до учреждения за 1-3 рабочих дня. Скачивайте приложение ZT и поддерживайте связь с близким человеком!

About

StarLine 2

Manage your car's security and settings remotely from your smartphone. Control alarm systems, start or stop the engine, and receive real-time alerts about your vehicle's status and events.

Highlights
  • Remote engine start/stop
  • Arm/disarm security system
  • Vehicle location tracking
  • Real-time event notifications
  • Valet mode
  • Anti-hijack mode
  • Sensor adjustment
Features
Read full description

StarLine Telematics: your vehicle is on your palm! Download the free StarLine mobile application to manage your car security settings from your smartphone. The application will work with any StarLine GSM alarm systems, GSM modules and trackers. Use the demo mode to learn more about the application. For non-commercial use only. The positioning accuracy depends on the satellite signal strength and may vary according to the map service of choice. APPLICATION FEATURES Simple registration - Register your car security system using a simple installation wizard. Easy device selection - Manage several StarLine devices: convenient for owners of several vehicles Easy to set up and manage - Arm and disarm your car security system; - Start and shut down your engine at unlimited distance - (*) Choose auto-start parameters with certain timer and temperature settings, set up a time for engine warm-up - In emergencies use "Anti-hijack" mode: your vehicle's engine will shut down at a safe distance from you - (*) If you pass your vehicle for repair or diagnostics, set your security settings to "valet" mode - Find your vehicle on a parking lot by activating a short siren signal - (*) Adjust shock and tilt sensor settings manually or turn them off when parking in a busy place - Create shortcuts for often used commands Intuitive vehicle's status indication - Make sure that the alarm system is armed - (*) The intuitive interface allows interpreting and understanding all security messages at a glance. - (*) You can see your device’s SIM card balance, car battery voltage, engine and interior temperature Get messages about any events with your vehicle - Receive PUSH messages on any events with your vehicle (alarm, engine started, security disarm etc.) - Select the types of messages you want to receive - Browse the log list to control an engine start-ups - (*) Learn device SIM card balance: low balance alerts delivered via PUSH messages Monitoring of your vehicle - (*) Comprehensive monitoring with track record. Review the routs length and speed on each part of track - Find your car location at online map in just seconds - Select the most convenient type of map - Find your own positioning Quick Help - Call to StarLine Support hotline directly from your App! - Rescue and assistance service numbers have been added (you change it to your local rescue numbers) - Feedback form has been embedded. We are always happy to answer your questions. The StarLine team is on call 24 hours StarLine support hotline: - Russia: 8 800 333-80-30 - Moscow: 8 495 935-80-30 - Kazakhstan: 8 800 070-80-30 - Belarus 810 8000 333-80-30 - Ukraine 0 800 502-308 - Kyrgyzstan 0 800 111-80-30 - Germany +49 2181 81955-35 - Italy +39 011 6998016 - Poland +48 602 199-049 - Estonia +372 510-4800 - Lithuania +372 510-4800 - Latvia +372 510-4800 - Spain +34 602 484657 - Greece +30 2310 477192 +30-2310-477192 - Azerbaijan +994 55 2020471 - Uzbekistan +998 71 2050830 - Slovakia +421 905 618856 - Saudi Arabia +966 505 335898 StarLine LLC, developer and manufacturer of security telematic equipment under StarLine brand, reserves the right to unilaterally make improvements in design and interface of the mobile application. StarLine: Affordable Telematics!

Screenshots

ZT4 screens
StarLine 24 screens

Verdict

The call

The clearest difference is rating: ZT at 4.7 against StarLine 2's 4.3. ZT also leads on iOS requirement (12.0 vs 16.0). On price, review sentiment, ratings volume and update cadence 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ZT holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 279 and 703 respectively. Written reviews complicate that: 19% of ZT's written reviews are positive against 26% of StarLine 2's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ZT ships an update every 3 weeks, StarLine 2 monthly. Both last shipped on October 20, 2026.

Scorecard2 real differences · 8 level
ZT versus StarLine 2: the parameters behind the verdict, then further details
ParameterZTStarLine 2
PriceFreeFree
Rating4.7 (279 ratings) — better4.3 (703 ratings)
Positive reviews19.4% of reviews25.6% of reviews — better
Number of ratings279703 — better
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS12.0 — better16.0
Further details — not scored
Size121 MB121 MB
Age rating4+4+
DeveloperZTK, OOOStarLine LLC

Customer experience

ZT

All ratings212 ratings
Positive90.1%
Neutral0.9%
Negative9.0%
Written reviews62 reviews
Positive19.4%
Neutral8.1%
Negative72.6%

StarLine 2

All ratings678 ratings
Positive83.6%
Neutral3.5%
Negative12.8%
Written reviews394 reviews
Positive25.6%
Neutral10.2%
Negative64.2%

Bugs and requests

ZT

Not enough reviews yet to summarise bugs or requests.

StarLine 2

Reported bugs

5 issues
  • App crashes on launch
  • Bluetooth connectivity issues
  • Incorrect balance display
  • Disappearing UI elements
  • Unreliable auto-start function

Requested features

5 requests
  • Add widget support
  • Improve language options
  • Enhance map and location features
  • Customize alarm sounds
  • Integrate with virtual assistants

In-app purchases

None

ZT

No in-app purchases

None

StarLine 2

No in-app purchases

Questions

Is ZT free?
ZT is free to download, with no in-app purchases.
Is StarLine 2 free?
StarLine 2 is free to download, with no in-app purchases.
Which has better reviews, ZT or StarLine 2?
ZT is rated higher. ZT averages 4.7 out of 5 from 279 ratings, while StarLine 2 averages 4.3 from 703 ratings.
Do ZT or StarLine 2 have ads?
Neither ZT nor StarLine 2 shows ads.
Which is updated more often, ZT or StarLine 2?
ZT ships an update every 3 weeks, and StarLine 2 monthly. Most recently, ZT was updated on October 20, 2026 and StarLine 2 on October 20, 2026.

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