Comparison

ZT vs UPENERGY

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

UPENERGY

Rent a portable charger in just a few clicks. This service allows you to pick up and return power banks at convenient locations, equipped with popular charging cables. It's designed for on-the-go power needs.

Highlights
  • Rent power banks easily
  • Pick up and return anywhere
  • Includes 3 popular cable types
  • Stations in malls, cafes, and transport hubs
  • Simple registration and usage
Features
Read full description

Арендуй зарядку в пару кликов. Скачай UPENERGY — крупный сервис аренды повербанков. Возьми и сдай где удобно. В каждом повербанке 3 самых популярных кабеля: micro-USB, type-c и lightning. Начать пользоваться просто: 1. Скачай приложение и зарегистрируйся 2. Нажми «Взять повербанк», следуй инструкции 3. Возьми повербанк и иди по своим делам - вернуть повербанк можно в другую станцию. Наши станции есть в торговых центрах, кафе, вокзалах, аэропортах и даже в другом городе - мы всегда готовы прийти на помощь.

Screenshots

ZT4 screens
UPENERGY3 screens

Verdict

The call

The clearest difference is review sentiment: UPENERGY at 100% against ZT's 18%. UPENERGY also leads on rating (5.0 vs 4.6). ZT's advantage is ratings volume (285 vs 2) and device support (3 vs 1). On price, update cadence, 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

UPENERGY holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: ZT has 285 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 18% of ZT's written reviews are positive against 100% of UPENERGY's.

UpkeepUpdate frequency

ZT ships an update every 3 weeks, UPENERGY every 4 weeks. The most recent releases landed on November 1, 2026 and October 17, 2026 respectively.

Scorecard5 real differences · 5 level
ZT versus UPENERGY: the parameters behind the verdict, then further details
ParameterZTUPENERGY
PriceFreeFree
Rating4.6 (285 ratings)5.0 (2 ratings) — better
Positive reviews18.5% of reviews100.0% of reviews — better
Number of ratings285 — better2
Update frequencyEvery 3 weeks — betterEvery 4 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better16.6
Further details — not scored
Size121 MB153 MB
Age rating4+4+
DeveloperZTK, OOOShishelyakin Nickolay Evgenevich, IP

Customer experience

ZT

All ratings212 ratings
Positive90.1%
Neutral0.9%
Negative9.0%
Written reviews65 reviews
Positive18.5%
Neutral7.7%
Negative73.8%

UPENERGY

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ZT

No in-app purchases

None

UPENERGY

No in-app purchases

Questions

Is ZT free?
ZT is free to download, with no in-app purchases.
Is UPENERGY free?
UPENERGY is free to download, with no in-app purchases.
Which has better reviews, ZT or UPENERGY?
UPENERGY is rated higher. ZT averages 4.6 out of 5 from 285 ratings, while UPENERGY averages 5.0 from 2 ratings.
Do ZT or UPENERGY have ads?
Neither ZT nor UPENERGY shows ads.
Which is updated more often, ZT or UPENERGY?
ZT ships an update every 3 weeks, and UPENERGY every 4 weeks. Most recently, ZT was updated on November 1, 2026 and UPENERGY on October 17, 2026.

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