Comparison

Data Usage vs zj

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

Head to head
About

Data Usage

Monitor your cellular data usage with this intuitive app. It helps you avoid expensive overage charges by providing real-time tracking, customizable alerts, and clear statistics. Manage multiple plans and understand your data consumption to save money.

Highlights
  • Home Screen Widget
  • Smart Data Tracking
  • Real-Time Network Speed Monitor
  • Multiple Plan Support
  • Usage Statistics Charts
  • Data Usage Alerts
Features
Read full description

Know before your data runs out. Data Usage turns your cellular counter into a clear plan forecast. See how much remains, whether your current pace is safe, and when you may run out—before the end of the cycle. CORE FEATURES • Track recurring, prepaid, travel, physical SIM, or eSIM plans you create • Switch plans without mixing their individual totals • Review daily trends and network speed • Get accuracy and high-usage alerts • Check remaining data from a Home Screen widget PREMIUM • Smart forecast and estimated run-out date • Predictive alerts when your pace may exhaust the plan early • Full history and custom date ranges • Unlimited plan management • Home Screen widget, dark theme, and no ads Built for privacy: no account and no VPN required. Your plan and usage records stay on your device. Accuracy note: iOS does not report per-app usage or automatically identify which SIM/eSIM plan consumed data. Select the active plan yourself. If iOS cannot recover usage after a restart or long gap, Data Usage will guide you to calibrate instead of showing false precision. Premium renews automatically unless canceled at least 24 hours before the current period ends. Manage or cancel in Settings > Apple Account > Subscriptions. Privacy: https://datausage.app/privacy Terms: https://datausage.app/terms

About

zj

Features
Read full description

工巧明以”待人著想,解決問題”為服務宗旨,透過悉心培育團隊,提供專業的設計解決您的困擾。我們在硬體方面提供以下服務: 自動化生產數據採集系統 – 有效掌握生產情況。 機械手臂與生產線整合 – 提供專業的整理統合方案,增進生產效率。 機械手臂改裝與人員教育訓練 – 提供改裝機械手臂與專業的教育訓練。 專業諮詢與改善方式 – 提供專業的諮詢服務,提升機械手臂與生產設備效率。 電能監控系統 – 即時資料呈現與歷史資料整合報表。 我們的專業團隊致力於為您提高生產效率,解決困擾,實現更好的效益。

Screenshots

Data Usage4 screens
zj4 screens

Verdict

The call

The clearest difference is in-app purchases: zj at none against Data Usage's 2. zj also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). Data Usage's advantage is update cadence (every 3 weeks vs every 2 months). On price 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. Data Usage sells 2 in-app purchases, starting at $1.99 per month. zj asks for nothing beyond the download.

UpkeepUpdate frequency

Data Usage ships an update every 3 weeks, zj every 2 months. The most recent releases landed on November 2, 2026 and October 15, 2026 respectively.

Scorecard4 real differences · 6 level
Data Usage versus zj: the parameters behind the verdict, then further details
ParameterData Usagezj
PriceFreeFree
Rating4.4 (1.2K ratings) — better—
Positive reviews46.6% of reviews—
Number of ratings1.2K — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.613.0 — better
Further details — not scored
Size41 MB97 MB
Age rating4+17+
DeveloperHungChun LaiWang ShihWen

Bugs and requests

Data Usage

Reported bugs

3 issues
  • App fails to update data usage correctly
  • Unable to save or load data plan settings
  • Compatibility issues with newer iOS versions

Requested features

3 requests
  • Add ability to track hotspot data usage
  • Provide data usage alerts and notifications
  • Allow setting decimal values for data limits

zj

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Data Usage

Subscriptions2
  • Premium Monthly7 Days trial$1.991 Month
  • Premium Yearly7 Days trial$9.991 Year
None

zj

No in-app purchases

Questions

Is Data Usage free?
Data Usage is free to download, with in-app purchases available.
Is zj free?
zj is free to download, with no in-app purchases.
Do Data Usage or zj have ads?
Data Usage shows ads; zj does not.
Which is updated more often, Data Usage or zj?
Data Usage ships an update every 3 weeks, and zj every 2 months. Most recently, Data Usage was updated on November 2, 2026 and zj on October 15, 2026.

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