Comparison

Sentinel vs innDex

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

Head to head
About

Sentinel

Access and verify Network Rail Sentinel smartcards. Check your own card details or authenticate team members and conduct spot checks. Works online for real-time data or offline for card access and stored check history.

Highlights
  • Read Sentinel smartcards via NFC
  • Scan QR codes for card data
  • Verify cardholder information
  • Authenticate team members
  • Perform spot checks
  • Check TVPs (Track Vacancy Permits)
  • Offline access to card data
Read full description

This app is designed specifically to read Sentinel smartcards for Network Rail’s Sentinel system. It allows anyone to check their own Sentinel card and allows authorised card checkers to authenticate their team as well as undertake spot checks and check TVPs. When online, the app shows the most up to date information for each cardholder either by scanning the card’s QR code or by reading the details stored in the smartcard using NFC. Even without mobile internet access, the information stored on the card can still be accessed, any recently scanned card details can also be reviewed, and all checks will be stored and uploaded to the database when back online.

About

innDex

Streamline construction project management with a cloud-based platform for site inductions, health & safety, quality, and progress reporting. Manage inductions, timesheets, inspections, and more from any device.

Highlights
  • Cloud-based project management
  • Streamlined site inductions
  • Health & Safety reporting
  • Quality and Progress tracking
  • Timesheet management
  • Inspection management
  • Asset and vehicle tracking
Features
Read full description

Looking for an easier, quicker, and more streamlined way to manage your construction projects? innDex is the ultimate cloud-based construction project management software designed to streamline your site inductions and enhance your overall project management experience. Our powerful tools allow you to create a comprehensive profile that includes all your essential information and training/competency records, which can be submitted as part of your site induction on multiple projects. Say goodbye to the hassle of filling out the same information over and over again for each project. But that's just the beginning. Once inducted, innDex becomes your go-to tool for managing all aspects of your construction project. From Health & Safety to Quality and Progress reporting, innDex has you covered. With innDex, you can easily manage inductions, timesheets, near misses/close calls, deliveries, inspections, assets, vehicles, quality checks, and much more. Plus, our cloud-based platform means you can access your project information from anywhere, at any time. Simplify your construction project management with innDex. Try it today and experience the difference for yourself.

Screenshots

Sentinel4 screens
innDex4 screens

Verdict

The call

The clearest difference is review sentiment: innDex at 60% against Sentinel's 10%. innDex also leads on update cadence (every 10 days vs every 4 months). On price, ads, in-app purchases and monetization model 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

Sentinel ships an update every 4 months, innDex every 10 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard2 real differences · 8 level
Sentinel versus innDex: the parameters behind the verdict, then further details
ParameterSentinelinnDex
PriceFreeFree
Rating—3.0 (2 ratings) — better
Positive reviews9.8% of reviews60.0% of reviews — better
Number of ratings—2 — better
Update frequencyEvery 4 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size8 MB71 MB
Age rating4+4+
DeveloperReference Point LimitedINNDEX LIMITED

Customer experience

Sentinel

Written reviews41 reviews
Positive9.8%
Neutral9.8%
Negative80.5%

innDex

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews20 reviews
Positive60.0%
Neutral5.0%
Negative35.0%

In-app purchases

None

Sentinel

No in-app purchases

None

innDex

No in-app purchases

Questions

Is Sentinel free?
Sentinel is free to download, with no in-app purchases.
Is innDex free?
innDex is free to download, with no in-app purchases.
Do Sentinel or innDex have ads?
Neither Sentinel nor innDex shows ads.
Which is updated more often, Sentinel or innDex?
Sentinel ships an update every 4 months, and innDex every 10 days. Most recently, Sentinel was updated on November 1, 2026 and innDex on November 3, 2026.

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