Comparison

Hydro CM vs Rolls

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

Head to head
About

Hydro CM

Explore a 3D augmented reality model of a hydro turbine to understand condition-monitoring solutions. Visualize optimized sensor installations and discover hardware/software that translates data into maintenance actions, protecting your assets and reducing costs.

Highlights
  • Augmented reality turbine visualization
  • Optimized sensor installation display
  • Maintenance action insights
  • Asset protection and optimization
  • Cost reduction analysis
Features
Read full description

Augmented Reality: monitoring your hydro turbine How to achieve the most detailed picture of hydro turbine health. Explore this 3D hydro turbine to understand Meggitt condition-monitoring solutions and how they protect and optimise the performance of critical high value rotating assets. This AR visualisation allows you to: > see optimised sensor installations – measure more parameters at lower cost. > discover hardware and software that turns monitoring data into specific maintenance actions. > understand how these solutions not only protect your machine from catastrophic failure but reduce maintenance costs. www.meggitt.com www.meggittsensing.com/energy

About

Rolls

This app provides employees and stakeholders with the company's principles on key activities and core Group Policies. It details standards of conduct, a decision-making framework for dilemmas, and channels for raising concerns. Interactive exercises help users navigate ethical issues.

Highlights
  • Company principles and Group Policies
  • Standards of conduct
  • Decision-making framework (TRUST model)
  • Speak up channels for concerns
  • Interactive ethical dilemma exercises
  • Information for employees, customers, suppliers, and investors
Features
Read full description

The Rolls-Royce Code of Conduct provides our principles on key areas of activity in our day-to-day roles and it is now available in an app, also including our Group Policies, the core policies that apply to all Rolls-Royce employees regardless of their role, seniority or location. At Rolls-Royce we believe that high standards of behaviour and compliance with laws and regulations are essential to protecting the reputation and long-term success of our business. We are committed to conducting our activities in the right way in line with our values and behaviours, free from any form of bribery or corruption. This app is for Rolls-Royce plc employees as well as our customer, suppliers, stakeholders and investors. This digital Code and Group Policies app details our principles and standards of conduct in line with our core values of Operate Safely, Act with Integrity and Trusted to Deliver Excellence. We also provide details on our TRUST model that is a decision making framework you can use if facing a dilemma and information of our speak up channels for individuals who wish to raise any concerns. The app now also includes interactive dilemma exercises that allow you to vote on how you would deal with an ethical issue.

Screenshots

Hydro CM4 screens
Rolls4 screens

Verdict

The call

The clearest difference is rating: Rolls at 5.0 against Hydro CM's 4.0. Hydro CM's advantage is update cadence (every 4 days vs every 3 months) and iOS requirement (12.0 vs 18.0). On price, ratings volume, ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Rolls holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Hydro CM ships an update every 4 days, Rolls every 3 months. The most recent releases landed on July 7, 2026 and June 1, 2026 respectively.

Scorecard3 real differences · 7 level
Hydro CM versus Rolls: the parameters behind the verdict, then further details
ParameterHydro CMRolls
PriceFreeFree
Rating4.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings11
Update frequencyEvery 4 days — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size361 MB89 MB
Age rating4+4+
DeveloperBloc DigitalRolls-Royce Holdings Plc

Customer experience

Hydro CM

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Rolls

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Hydro CM

No in-app purchases

None

Rolls

No in-app purchases

Questions

Is Hydro CM free?
Hydro CM is free to download, with no in-app purchases.
Is Rolls free?
Rolls is free to download, with no in-app purchases.
Which has better reviews, Hydro CM or Rolls?
Rolls is rated higher. Hydro CM averages 4.0 out of 5 from 1 ratings, while Rolls averages 5.0 from 1 ratings.
Do Hydro CM or Rolls have ads?
Neither Hydro CM nor Rolls shows ads.
Which is updated more often, Hydro CM or Rolls?
Hydro CM ships an update every 4 days, and Rolls every 3 months. Most recently, Hydro CM was updated on July 7, 2026 and Rolls on June 1, 2026.

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