Comparison

Digital Documentation vs NeRV

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

Head to head
About

Digital Documentation

Features
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Discover the potential of Augmented Reality (AR) by exploring the 3D models of Rosslyn Chapel and the Nagasaki Giant Cantilever Crane. 
Use this app in conjunction with our Short Guide historicenvironment.scot/dd-short-guide ABOUT THE SHORT GUIDE: 
Historic Environment Scotland’s free Short Guide, ‘Applied Digital Documentation in the Historic Environment’ looks at different data capture techniques that can be used in the analysis, recording, conservation and visualisation of historic objects, sites and landscapes in their present condition. 
Its’ case studies outlines the uses and applications of potentially vast, multi-layered datasets. Each section within the guide will present best practices, as well as fundamental principles that will assist those looking to undertake digital documentation. 
For the AR triggers, please view pages 84 and 85 within the guide. 
 ABOUT ROSSLYN CHAPEL: 
Rosslyn Chapel is a late medieval, listed building and Scheduled Ancient Monument located in the village of Roslin, near Edinburgh. 
The Centre for Digital Documentation and Visualisation LLP (CDDV) is a partnership between Historic Environment Scotland and The Glasgow School of Art. Since 2008, CDDV has digitally documented the interior and exterior of Rosslyn Chapel using cutting-edge laser scanning technologies and 360° panoramic photography; the 3D laser scan data was later developed into a photorealistic, virtual 3D model of the chapel. 
 ABOUT THE NAGASAKI CRANE: 
The Giant Cantilever Crane is situated at the Mitsubishi Heavy Industries shipyard in Nagasaki, Japan. It is a major landmark in a city with strong historical links to Scotland. The crane itself was designed by the Glasgow Electric Crane and Hoist Company, and constructed by the Motherwell Bridge Company. 
The Centre for Digital Documentation and Visualisation LLP (CDDV) 3D laser scanned the crane as part of the Scottish Ten project, which digitally documented Scotland’s then five World Heritage Sites and a further five international heritage sites. 
 FEEDBACK WELCOME: 
We are always happy to receive feedback, so please do send your thoughts and ideas on how we can improve this app to digital@hes.scot.

About

NeRV

Features
Read full description

Step inside Futures Close and explore real UK homes from the 1910s to the 1990s, each highlighting energy-efficient technologies designed to reduce carbon footprints. The NeRV - Futures Close App offers an interactive way to understand how heating systems, insulation, and cutting-edge energy-saving solutions improve daily living. Futures Close represents a variety of UK building types, with nine properties you can intimately explore. Each home provides details on its environmental impact, running costs, and the unique challenges faced by its residents. Acting as a digital twin of the real site near Newcastle, the app gives access to live data from over 2,000 on-site sensors. See how actions, like turning on a light, affect room sensors and energy efficiency in real time. Whether you're onsite or exploring remotely, scan exteriors for guided tours or discover AR elements projecting eco-saving technologies inside and outside the properties. Plus, the built-in AI guide provides valuable insights as you navigate through the app. Key Features: - Explore UK homes from different eras, showcasing energy-saving interventions. - Real-time data from sensors to reveal the environmental impact and running costs of each property. - Interact with the environment and see real-time effects of your actions. - AR elements to visualise eco-saving technologies within and outside the homes. - AI-guided insights to enhance your learning experience.

Screenshots

Digital Documentation4 screens
NeRV4 screens

Verdict

The call

The clearest difference is ads: Digital Documentation at none against NeRV's shown. Digital Documentation also leads on iOS requirement (11.0 vs 15.0). NeRV's advantage is update cadence (every 8 months vs every 37 months). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Digital Documentation ships an update every 37 months, NeRV every 8 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 3 level
Digital Documentation versus NeRV: the parameters behind the verdict, then further details
ParameterDigital DocumentationNeRV
PriceFreeFree
Update frequencyEvery 37 monthsEvery 8 months — better
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size122 MB857 MB
Age rating4+4+
DeveloperHistoric Environment ScotlandDigitalnauts Limited

In-app purchases

None

Digital Documentation

No in-app purchases

None

NeRV

No in-app purchases

Questions

Is Digital Documentation free?
Digital Documentation is free to download, with no in-app purchases.
Is NeRV free?
NeRV is free to download, with no in-app purchases.
Do Digital Documentation or NeRV have ads?
NeRV shows ads; Digital Documentation does not.
Which is updated more often, Digital Documentation or NeRV?
Digital Documentation ships an update every 37 months, and NeRV every 8 months. Most recently, Digital Documentation was updated on November 2, 2026 and NeRV on November 4, 2026.

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