Comparison

System Activity Monitors vs Deviapp

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

Head to head
About

System Activity Monitors

Monitor your device's health with this comprehensive tool. Track memory, battery performance, storage, and network details. Get detailed camera information and helpful battery-saving tips to optimize your iPhone.

Highlights
  • Memory usage tracking
  • Battery performance monitoring
  • Device IP and hardware address
  • Battery saving tips
  • Used and free space indicator
  • Detailed camera information
  • System and hardware specs
Features
Read full description

The System Activity Monitor stands out as the most inclusive health check application available on the App Store. It diligently tracks memory usage, battery performance, device details such as IP address and hardware address, provides battery tips, furnishes comprehensive system information, and indicates used space on your iOS device. Now, it comes with enhanced camera information, offering detailed insights into your iPhone camera system, covering telephoto, wide, and ultra-wide lenses. This app serves as a precise tool to monitor battery life, delivering timely tips that maximize your battery usage for an optimal and prolonged battery life. KEY FEATURES: 1. Battery tips are shown to help save battery life while using the iPhone. 2. Tap battery to see the battery capacity for your favorite apps. 3. Shows the used and free space on your iPhone/iPod. 4. Shows the IP address acquired, and hardware address of your device. 5. Displays a long list of device information, like physical specs, hardware info, and many more. These are the different views on the App. Memory view: Shows the used and free iPhone memory available as used by other apps. This is shown in an excellent speedometer animation view. Close out the other apps, and see the memory being reclaimed in this app, when the speedometer shows the free memory available increase. This has an LED indicator with blue, green, yellow and red colors indicating the amount of memory being used. Battery view: This view shows the battery available for discharge, how much time to recharge to make it full, and when it is charged to FULL, displays an indication, as "FULLY CHARGED", as opposed to quick charge. It has glow panels on the top to let you know, how much battery is available. Tap the battery on the fill, to show the detailed break up of battery availability for 3G talk time, browsing, videos, games etc. Animated battery charging with current flashes inside the battery. Space used view: This is shown as a pie-chart that presents the used and free space available on your iOS device. Info view: Now it shows a lot more device information, like system information, camera information, display, hardware and physical characteristics. It shows whether you device is connected to Wi-Fi or cellular and its IP address. ## Few of our user TESTIMONIALS ## $ Way cool This is a terrific system tracker. - Macquest $ Definitely get this App.! Love the cool dashboard. Tells you what's going on in the Apple brain in your iPad or iPhone. This App rules. - Battyguy $ Simple App ! Great tool! Helps to keep your standby time ridiculously long and device running smoothly. - Spader1969. $ I have tried many products like this one and so far I keep coming back to this one. - Markeith3000 Subscription Info Sysmon, our paid subscription product, is paid per year for annual subscriptions, per month for monthly subscriptions, and per week for weekly subscriptions. 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. Account will be charged for renewal within 24 hours prior to the end of the current period an annual subscription, monthly subscription, and weekly subscription, as the case may be. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription, where applicable.” Privacy policy and terms of use https://tektontek.com/termsofuse.php STAY UPDATED - Website - https://sysmon.tektontek.com Twitter - @AppLifeStyle Facebook - facebook.com/tektontek

About

Deviapp

Access detailed information about your device's software, memory, battery, and technical specifications. It also offers display diagnostics and a feature to block phishing sites for enhanced online safety and data protection.

Highlights
  • Device information (software, memory, battery)
  • Technical and physical characteristics
  • Display diagnostics
  • Phishing site blocking
  • Ad blocking (subscription)
  • Safe browsing for children
Features
Read full description

Deviapp is a simple application that lets you know all the basic information about your device. Whether it is information about your software, your device's memory, information about your battery, technical or physical characteristics. Deviapp will also help you perform simple diagnostics on your device's display. Use the application to feel all the simplicity and ease of work. The application has the function of blocking phishing sites. With just one click, you can enjoy safe browsing in Safari. This can help you keep your child safe by denying access to websites with suspicious content. By blocking phishing sites, you protect your data from intruders. Subscription details Become an advanced user. You can use the advanced service to block ads and phishing sites in Safari. -You have a 3-day free trial before subscribing. This will not affect the free service. -Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current billing period. Payment will be charged to your Apple ID account. -Your account will be charged for renewal within 24 hours prior to the end of the current period and will also indicate the cost of the renewal. -Subscriptions can be managed and auto-renewal can be turned off by going to your App Store account settings. Before using the app, be sure to read the Privacy Policy and Terms of Use: https://deviapapp.com/privacy-police/ https://deviapapp.com/terms-of-use/

Screenshots

System Activity Monitors4 screens
Deviapp4 screens

Verdict

The call

The clearest difference is ads: System Activity Monitors at none against Deviapp's shown. Deviapp's advantage is rating (4.5 vs 4.2) and review sentiment (86% vs 76%). On price, ratings volume, update cadence 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. System Activity Monitors sells 4 in-app purchases, starting at $3.99 per 7 days and Deviapp sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Deviapp holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 774 and 480 respectively. Written reviews point the same way: 76% of System Activity Monitors's written reviews are positive against 86% of Deviapp's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
System Activity Monitors versus Deviapp: the parameters behind the verdict, then further details
ParameterSystem Activity MonitorsDeviapp
PriceFreeFree
Rating4.2 (774 ratings)4.5 (480 ratings) — better
Positive reviews76.0% of reviews86.5% of reviews — better
Number of ratings774 — better480
Update frequencyEvery 3 monthsEvery 3 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.012.2 — better
Further details — not scored
Size28 MB13 MB
Age rating4+4+
DeveloperTekton Technologies (P) Ltd.LOOP LEAD CONSULTING PC

Customer experience

System Activity Monitors

All ratings774 ratings
Positive79.6%
Neutral5.6%
Negative14.9%
Written reviews658 reviews
Positive76.0%
Neutral7.6%
Negative16.4%

Deviapp

All ratings480 ratings
Positive86.3%
Neutral4.6%
Negative9.2%
Written reviews96 reviews
Positive86.5%
Neutral0.0%
Negative13.5%

User reviews

System Activity Monitors

From 774 App Store ratings

What we love

  • 💯 Excellent app
  • 🎆 Great app
  • 🔒 Respects privacy
  • 🔋 Helpful battery tips
  • 👍 Simple and straightforward

Room to improve

  • 🐛 Buggy updates
  • 💰 Subscription-based model
  • 🔒 Privacy concerns due to required login
  • 🔍 Limited functionality for free version
  • 🔍 Inaccurate device information

Deviapp

From 480 App Store ratings

What we love

  • 🔒 Protects against cyber security risks
  • 👍 Easy to use and understand
  • 🚀 Efficient data management

Room to improve

  • 🐛 Inaccurate virus detection
  • 💰 Charges fees for basic functionality
  • 🚫 Unreliable and unresponsive support

Bugs and requests

System Activity Monitors

Reported bugs

3 issues
  • Crashes on certain devices
  • Login/registration issues
  • Incorrect memory/CPU usage reporting

Requested features

5 requests
  • Ability to close/manage running apps
  • More detailed app-level usage breakdown
  • Dark mode option
  • Widgets for quick access
  • Ability to reclaim memory/free up storage

Deviapp

Reported bugs

2 issues
  • Frequent crashes and freezes
  • Compatibility issues with older devices

Requested features

2 requests
  • Option to cancel subscription
  • Transparent pricing structure

In-app purchases

4 purchases

System Activity Monitors

Subscriptions3
  • Sysmon Pro$3.997 Days
  • Sysmon Pro3 Days trial$6.991 Month
  • Sysmon Pro7 Days trial$29.991 Year
One-time1
  • Real Time Graphs$2.99
2 purchases

Deviapp

Subscriptions2
  • Deviapp Premium Week3 Days trial$9.997 Days
  • Deviapp Premium Month3 Days trial$29.991 Month

Questions

Is System Activity Monitors free?
System Activity Monitors is free to download, with in-app purchases available.
Is Deviapp free?
Deviapp is free to download, with in-app purchases available.
Which has better reviews, System Activity Monitors or Deviapp?
Deviapp is rated higher. System Activity Monitors averages 4.2 out of 5 from 774 ratings, while Deviapp averages 4.5 from 480 ratings.
Do System Activity Monitors or Deviapp have ads?
Deviapp shows ads; System Activity Monitors does not.
Which is updated more often, System Activity Monitors or Deviapp?
System Activity Monitors ships an update every 3 months, and Deviapp every 3 months. Most recently, System Activity Monitors was updated on October 11, 2026 and Deviapp on October 6, 2026.

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