Comparison

TerraIndex vs IAD

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

Head to head

About

TerraIndex

Features

Read full description

TerraIndex App, the app for conducting soil surveys! Below is an overview of the different surveys you can perform in TerraIndex: - Environmental soil testing - Geotechnical soil analysis - (Ground) water sampling - Water soil investigation The current version contains all functionalities for registering soil data. Functional Benefits TerraIndex has the following advantages: - Time saving - Simple way of registering soil data - No paper usage or risk of losing data - Fast communication with the consulting firm - Synchronization with the office - TerraIndex is multilingual. Field observations are done in your own language. - You no longer need to retype data. Field data is digitally stored directly in the field. - The App can be used both online and offline. - I.T. Works takes care of maintenance, updates and back up of data. Use your TerraIndex username and password to log in. Don't have a username and password yet? Please contact your TerraIndex or I.T. Works application administrator.

About

IAD

Features

Read full description

IAD-Online version 2 The fully renewed asbestos survey App. App suited for both phone and tablet and can be used in both the Dutch and English language. Who should use the App? - The App is exclusively available for IAD-Online users. IAD-Online is a compleet backend system for the registration of asbestos by an asbestos survey company. What can you expect from the App? - Search and view existing projects (view mode) - Download project to mobile device for offline survey (survey mode) - Add sources / samples and images - Add restrictions - Add inaccessible areas - Add Observations (don't have to be asbestos related) - Checklist capabilities (customer specific) - Input lists (customer specific) - Add additional images (project picture/photo sheet/other photos) - Deskresearch (research information prior to survey) - View/Upload attachments - Draw arrows in images - Chroom 6 surveys For additional information please visit https://www.iad-online.nl (Dutch only) For more information please contact info@iad-online.nl

Screenshots

IAD4 screens

Verdict

The call

The clearest difference is update cadence: TerraIndex at every 8 days against IAD's every 3 weeks. IAD's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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

TerraIndex ships an update every 8 days, IAD every 3 weeks. The most recent releases landed on October 26, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 4 level

TerraIndex versus IAD: the parameters behind the verdict, then further details
Parameter	TerraIndex	IAD
Price	Free	Free
Update frequency	Every 8 days — better	Every 3 weeks
Ads	No	No
In-app purchases	No	No
Devices	iPad	iPhone, iPad, iPod — better
Requires iOS	13.0	13.0
Further details — not scored
Size	58 MB	36 MB
Age rating	4+	4+
Developer	TerraIndex B.V.	RGPO IT Services B.V.

In-app purchases

None

TerraIndex

No in-app purchases

None

IAD

No in-app purchases

Questions

Is TerraIndex free?

TerraIndex is free to download, with no in-app purchases.

Is IAD free?

IAD is free to download, with no in-app purchases.

Do TerraIndex or IAD have ads?

Neither TerraIndex nor IAD shows ads.

Which is updated more often, TerraIndex or IAD?

TerraIndex ships an update every 8 days, and IAD every 3 weeks. Most recently, TerraIndex was updated on October 26, 2026 and IAD on October 10, 2026.