Comparison

Black Box vs Flux+

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

Head to head
About

Black Box

Secure your phone by locking and restricting access to sensitive applications. Protect your private data with advanced password protection and prevent unauthorized app usage or in-app purchases. Enjoy comprehensive digital privacy with an easy-to-use interface.

Highlights
  • App locking with password protection
  • App disappearance for hidden access
  • App usage restrictions
  • Secure privacy with advanced passwords
  • Payment locking for in-app purchases
  • Intuitive interface
Features
Read full description

Black Box: Easily lock and restrict apps, protect your private data with one click. Secure your phone with a password. 100% safe and private! Don't want others to see your privacy? Use our lock and restrict features to keep your apps and data hidden from others. Try this most secure app lock and give your phone 100% privacy protection. 【Key Features】 App Locking: Set password protection for sensitive apps like social media, photo galleries, etc., protecting your privacy anytime, anywhere. App Disappearance: No one but you can find your apps unless you actively reveal them. App Restrictions: Limit app installation, deletion, in-app purchases, control app visibility everywhere, and lock app usage. Secure Privacy: The app lock features advanced security passwords, helping you lock apps and prevent others from casually viewing in-app data. Payment Locking: Lock App Store in-app purchases to avoid accidental payments or prevent your children from buying games. 【Why Choose Black Box?】 100% Safe and Reliable: Uses advanced encryption technology Easy to Use: Intuitive interface design, effortless to get started Comprehensive Protection: Guards your privacy from apps to files Continuous Updates: We constantly improve features to provide you with the best experience Download Black Box now and enjoy true digital privacy! Your encouragement drives our progress! Stay tuned for more powerful features coming soon. If you encounter any issues or have suggestions while using the app, please feel free to provide feedback within the app. blackbox@whohub.cn Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://blackbox.whohub.cn/policy/privacy Use the most reliable app lock to protect your privacy, easily safeguard your digital privacy. Use the app lock to lock apps or protect apps from being discovered, ensuring your security.

About

Flux+

Features
Read full description

Flux is a system insights app for people who care how their device behaves over time. Instead of live dashboards and constant numbers, Flux focuses on patterns, drift, and change — the quiet signals that usually get lost in real-time noise. Track how your device evolves throughout the day and across longer periods, with carefully designed visuals that prioritise clarity over clutter. What Flux shows you: - Battery behaviour and long-term drift - Connectivity changes (Wi‑Fi, cellular, Bluetooth) - Thermal state patterns - Background activity trends - Timeline-based system events Designed to feel different: Flux avoids the typical system monitor aesthetic. No flashing charts. No aggressive colours. No unnecessary alerts. Privacy-first by design: Flux does not collect, track, or sell your data. All analysis happens locally on your device. Built for today — ready for tomorrow: Flux is designed with future features in mind, including widgets and deeper long-term insights, while staying fully compliant with Apple’s platform guidelines.

Screenshots

Black Box4 screens
Flux+3 screens

Verdict

The call

Black Box and Flux+ are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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.

ScorecardNo meaningful differences
Black Box versus Flux+: the parameters behind the verdict, then further details
ParameterBlack BoxFlux+
PriceFreeFree
Rating4.7 (41 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings41 — better—
Update frequencyEvery 3 days—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better17.6
Further details — not scored
Size68 MB1 MB
Age rating4+12+
Developer俊涛 刘1BIGRIG Ltd

In-app purchases

None

Black Box

No in-app purchases

None

Flux+

No in-app purchases

Questions

Is Black Box free?
Black Box is free to download, with no in-app purchases.
Is Flux+ free?
Flux+ is free to download, with no in-app purchases.
Do Black Box or Flux+ have ads?
Neither Black Box nor Flux+ shows ads.

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