Comparison

Rola vs DVL Locks

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

Head to head
About

Rola

Features
Read full description

This app provides remote monitoring of your Rola-Chem Controller, delivering real-time visibility into pH and ORP levels. Easily view your latest readings in one place to stay informed, reducing the need for physical site visits.

About

DVL Locks

Features
Read full description

The DVL app allows you to manage your DVL Locks. - Add your locks simply by scanning the QR code on them - Retrieve lock combinations - Share your locks with others - Organize your locks by location or by people you have shared your locks with Subscription Details When you buy a lock, the first year is free. Subscriptions are on an annual basis What you get with the subscription: - Basic supports up to 5 locks for $5 billed annually - Plus supports 6 to 20 locks for $10 billed annually - Premium supports 21 to 100 locks for $20 billed annually Note, the number of locks only includes locks you owned. You have unlimited locks shared with you. For the paid plans you will be charged to your Apple Account, which will automatically renew unless canceled at least 24 hours before the end of the current period. Auto-renew can be turned off anytime by going to your Profile after purchase. Terms of Use can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Rola3 screens
DVL Locks4 screens

Verdict

The call

The clearest difference is in-app purchases: Rola at none against DVL Locks's 3. On price, update cadence, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. DVL Locks sells 3 in-app purchases, starting at $5.00 per year. Rola asks for nothing beyond the download.

UpkeepUpdate frequency

Rola ships an update every 6 weeks, DVL Locks every 3 weeks. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.

Scorecard1 real difference ยท 5 level
Rola versus DVL Locks: the parameters behind the verdict, then further details
ParameterRolaDVL Locks
PriceFreeFree
Update frequencyEvery 6 weeksEvery 3 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPod
Requires iOS16.016
Further details โ€” not scored
Size22 MB62 MB
Age rating4+4+
DeveloperRed7 Systems IncDaVinci Lock, LLC

In-app purchases

None

Rola

No in-app purchases

3 purchases

DVL Locks

Subscriptions3
  • Basic1 Year trial$5.001 Year
  • Plus1 Year trial$10.001 Year
  • Premium1 Year trial$20.001 Year

Questions

Is Rola free?
Rola is free to download, with no in-app purchases.
Is DVL Locks free?
DVL Locks is free to download, with in-app purchases available.
Do Rola or DVL Locks have ads?
Neither Rola nor DVL Locks shows ads.
Which is updated more often, Rola or DVL Locks?
Rola ships an update every 6 weeks, and DVL Locks every 3 weeks. Most recently, Rola was updated on October 18, 2026 and DVL Locks on October 13, 2026.

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