Comparison

CheckCentral vs Periscope by Duet

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

Head to head
About

CheckCentral

This app monitors your email notifications and alerts you instantly via SMS, email, or push notifications when an issue requires your attention. It serves as a mobile companion to the CheckCentral service, requiring an account to use.

Highlights
  • Email notification monitoring
  • Instant alerts (SMS, email, push)
  • Companion mobile app
  • Requires CheckCentral account
Features
Read full description

Say goodbye to manually reviewing your email notifications! CheckCentral monitors your notifications for you, and will let you know when something needs your attention. When something is wrong, you’ll know instantly via SMS, email and mobile push notifications. ** This is the mobile companion app for the CheckCentral service. You need a CheckCentral account to use this application.

About

Periscope by Duet

This app provides a secure VPN connection to your home network from anywhere. It uses end-to-end encryption and smart connectivity to ensure reliable access to your home services and devices, even on restrictive networks. Setup is simple, allowing you to stay connected to your trusted network while traveling.

Highlights
  • Connect to home network globally
  • WireGuard protocol
  • End-to-end encryption
  • Smart connectivity for restrictive networks
  • Real-time connection stats
  • Simple setup
Features
Read full description

Periscope — A VPN to Your Own Home Periscope is a VPN that routes your traffic through your own home network instead of a rented data center. You keep one device running there — an Apple TV, a Mac or a PC — and your iPhone and iPad connect back to it from anywhere in the world. That one difference changes what a VPN is for. Your traffic leaves from your own address, so banks, local services and your own devices see the connection they expect. There is no country list to choose from, because there is only one exit: your home. PRIVATE BY DESIGN Your connection is end-to-end encrypted using WireGuard, one of the most secure VPN protocols available. This means your traffic is always private — even we can't see what you're doing. Whether you connect directly or through our relay servers, your data remains yours alone. WORKS FROM ANYWHERE Hotel WiFi blocking VPN connections? Challenging airport network? Periscope's smart connectivity automatically uses direct connection, NAT traversal, or relay fallback to establish a reliable tunnel — no manual configuration needed. FEATURES • Connect to your home network from anywhere in the world • Built on WireGuard — fast, modern, and battery-efficient • End-to-end encryption keeps your traffic private • Smart connectivity that works on restrictive networks • Real-time connection stats and diagnostics • Optimized for iPhone and iPad PERFECT FOR • Accessing your home network services while traveling • Connecting to devices on your home network • Keeping your browsing on your own trusted connection • Privacy-conscious travelers who don't trust public WiFi SIMPLE SETUP Install Periscope on the device that stays home and choose "Server". Install it on the iPhone and iPad you travel with, sign in with the same account, and tap connect. No admin console, no config files, no network settings to learn. FLEXIBLE PLANS Monthly or annual subscriptions. Start with a free trial. Travel the world. Stay connected to home. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CheckCentral4 screens
Periscope by Duet3 screens

Verdict

The call

The clearest difference is rating: Periscope by Duet at 5.0 against CheckCentral's 1.0. Periscope by Duet also leads on update cadence (fortnightly vs every 4 months) and ratings volume (4 vs 1). CheckCentral's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 17.0). On price, ads 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. Periscope by Duet sells 2 in-app purchases, starting at $5.99 per month. CheckCentral asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Periscope by Duet holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

CheckCentral ships an update every 4 months, Periscope by Duet fortnightly. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.

Scorecard6 real differences · 4 level
CheckCentral versus Periscope by Duet: the parameters behind the verdict, then further details
ParameterCheckCentralPeriscope by Duet
PriceFreeFree
Rating1.0 (1 ratings)5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings14 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple TV
Requires iOS15.0 — better17.0
Further details — not scored
Size8 MB43 MB
Age rating4+4+
DeveloperBinary Fortress SoftwareDuet, Inc.

Customer experience

CheckCentral

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

Periscope by Duet

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CheckCentral

No in-app purchases

2 purchases

Periscope by Duet

Subscriptions2
  • Periscope Monthly7 Days trial$5.991 Month
  • Periscope7 Days trial$24.991 Year

Questions

Is CheckCentral free?
CheckCentral is free to download, with no in-app purchases.
Is Periscope by Duet free?
Periscope by Duet is free to download, with in-app purchases available.
Which has better reviews, CheckCentral or Periscope by Duet?
Periscope by Duet is rated higher. CheckCentral averages 1.0 out of 5 from 1 ratings, while Periscope by Duet averages 5.0 from 4 ratings.
Do CheckCentral or Periscope by Duet have ads?
Neither CheckCentral nor Periscope by Duet shows ads.
Which is updated more often, CheckCentral or Periscope by Duet?
CheckCentral ships an update every 4 months, and Periscope by Duet fortnightly. Most recently, CheckCentral was updated on November 1, 2026 and Periscope by Duet on November 13, 2026.

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