Comparison

Spy Detector vs Invoice Maker・Estimate Creator

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

Head to head
About

Spy Detector

This app helps you enhance your personal security by scanning your surroundings for unauthorized devices and unusual reflections. It offers quick checks and an intuitive interface to provide peace of mind in various locations.

Highlights
  • Network scan for unknown devices
  • Bluetooth device detection
  • Light and reflection filter
  • Quick instant scans
  • Intuitive user interface
Features
Read full description

In today’s world, protecting your digital and personal space is more important than ever. Whether you’re in a hotel, rental apartment, co-working area, or traveling, stay safe and confident with Security Scanner. Key Features Network Scan: Identify unknown or unauthorized devices connected to your Wi-Fi or Bluetooth. Light & Reflection Filter: Use screen-based filters to help notice unusual reflections in your surroundings. Quick Check: Run instant scans anytime, anywhere. Easy to Use: A clear and intuitive interface helps you get results in just seconds. Perfect for Hotel rooms & rental apartments Office & co-working spaces Locker rooms & public areas Daily commutes & travel safety With its simple interface, Security Scanner makes advanced safety tools accessible to everyone—helping you maintain peace of mind, wherever you are. Information about the auto-renewal of subscription: - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the period. - If you want to continue the service, your subscription should be continued. - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - The account will be charged for renewal within 24-hours prior to the end of the current period. - There are 3 packages including: 1 week, 1 month, 1 year. Once it expires, your subscription will automatically renew. Terms of Use https://www.privacypolicies.com/live/1c700656-4706-42ff-8da6-74f0754a043d Privacy Policy https://www.privacypolicies.com/live/e1d8dc03-bee0-479c-9d75-a80b5e63814a

About

Invoice Maker・Estimate Creator

Create, send, and manage professional invoices, quotes, and receipts quickly and easily. Organize all your billing documents in one place to improve cash flow and get paid faster. Ideal for freelancers and small businesses seeking a simple, efficient billing solution.

Highlights
  • Smart digital invoicing
  • Fast and simple billing
  • One-tap invoice creation
  • Organized invoice dashboard
  • Printable documents (subscription)
  • Customizable with logo and business details
Features
Read full description

Smart Invoice Maker & Bill Generator Create, send, and manage invoices effortlessly — all from one powerful app built for freelancers, small businesses, and professionals who value speed, simplicity, and smart organization. Whether you’re billing clients, tracking payments, or managing your business finances, this app helps you stay professional and get paid faster — anytime, anywhere. Main features: ► Smart Digital Invoicing Make professional invoices, quotes, and receipts in seconds. Add your logo, business details, and payment info — all from your phone. ► Fast & Simple Billing Bill customers on the go with a single tap. Turn estimates into invoices instantly and send them by email, text, or PDF. ► One-Tap Invoice Creation Save time with reusable templates and auto-filled client details. Generate invoices faster than ever. ► Invoices Organizing All your bills, receipts, and estimates neatly stored in one dashboard. Sort, search, and export with ease. In addition, we offer documents printing functionality with subscription. --- Why Users Love It ► Create smart digital invoices instantly ► Bill customers fast and professionally ► Organize all invoices in one secure place ► Simplify payments and improve cash flow --- Perfect For Freelancers, small business owners, contractors, consultants, and anyone who wants an easier way to handle billing without the paperwork or hassle. Download now and take control of your business — create, send, and track invoices anytime, anywhere! Need help? We’re here to support you: benoitdaucourt@icloud.com Privacy Policy: https://docs.google.com/document/d/1mUKeSv0wkrNmpLpgXIKsCmeZF1U58tcd Terms of Use: https://docs.google.com/document/d/1rrkxypEEXXreb5DrpLAf61AY3O6hNlzt

Screenshots

Spy Detector3 screens
Invoice Maker・Estimate Creator4 screens

Verdict

The call

The clearest difference is rating: Spy Detector at 4.8 against Invoice Maker・Estimate Creator's 2.0. Spy Detector also leads on ratings volume (12 vs 1) and iOS requirement (14.0 vs 18.5). Invoice Maker・Estimate Creator's advantage is update cadence (weekly vs monthly). On price, ads, in-app purchases and monetization model 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. Spy Detector sells 3 in-app purchases, starting at $6.99 per 7 days and Invoice Maker・Estimate Creator sells 1 in-app purchase, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Spy Detector holds the better App Store score, 4.8 against 2.0. That said, the two scores are not equally well evidenced: Spy Detector has 12 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Spy Detector ships an update monthly, Invoice Maker・Estimate Creator weekly. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 5 level
Spy Detector versus Invoice Maker・Estimate Creator: the parameters behind the verdict, then further details
ParameterSpy DetectorInvoice Maker・Estimate Creator
PriceFreeFree
Rating4.8 (12 ratings) — better2.0 (1 ratings)
Number of ratings12 — better1
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS14.0 — better18.5
Further details — not scored
Size63 MB14 MB
Age rating4+4+
Developer胭 李Arlo Balme

Customer experience

Spy Detector

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%

Invoice Maker・Estimate Creator

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

Spy Detector

Subscriptions3
  • Spy Detector Pro Week$6.997 Days
  • Spy Detector Pro Month$14.991 Month
  • Spy Detector Pro year$29.991 Year
1 purchases

Invoice Maker・Estimate Creator

Subscriptions1
  • Weekly Unlimited Access3 Days trial$6.997 Days

Questions

Is Spy Detector free?
Spy Detector is free to download, with in-app purchases available.
Is Invoice Maker・Estimate Creator free?
Invoice Maker・Estimate Creator is free to download, with in-app purchases available.
Which has better reviews, Spy Detector or Invoice Maker・Estimate Creator?
Spy Detector is rated higher. Spy Detector averages 4.8 out of 5 from 12 ratings, while Invoice Maker・Estimate Creator averages 2.0 from 1 ratings.
Do Spy Detector or Invoice Maker・Estimate Creator have ads?
Neither Spy Detector nor Invoice Maker・Estimate Creator shows ads.
Which is updated more often, Spy Detector or Invoice Maker・Estimate Creator?
Spy Detector ships an update monthly, and Invoice Maker・Estimate Creator weekly. Most recently, Spy Detector was updated on October 6, 2026 and Invoice Maker・Estimate Creator on October 14, 2026.

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