TWIC ADVISR vs iAssign
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TWIC ADVISR
This app verifies TWIC cards by checking their Credential Identification Number against a list of canceled numbers. It can scan barcodes or accept manual entry, then indicates if the card is canceled, expired, or valid.
- TWIC card verification
- CIN number check
- Barcode scanning
- Manual CIN entry
- Expiration date check
- Card status indicator
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Uses the Credential Identification Number (CIN) printed on the back of the TWIC card and compares it against a List of Canceled CIN Numbers (LCCN) to determine if the card has been canceled. The CIN can be entered via a keypad or the barcode can be scanned via the device's camera. If the CIN is found on the list, the display indicates the card is canceled. If the CIN is not on the list, the operator is prompted to check the expiration date printed on the front of the card. If the card is expired, the display indicates to the operator that it is expired. If it has not expired, the display indicates that the card has not been canceled. There is NO electronic read of the card and NO verification of any data stored in the card is performed.
iAssign
This app helps monitor worker safety by tracking exposure to dangerous conditions and identifying unsafe behaviors. It uses beacons and tags to automatically log location data and alert users to restricted areas, enhancing worksite visibility and data interpretation.
- Automatic site assignment via beacons
- Proximity alerts for restricted areas
- Manual worker check-in/out
- Gas detection data interpretation
- Bluetooth-enabled tracking
- Enhanced worksite visibility
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Know when and where workers were exposed to dangerous conditions and gain visibility into unsafe worker behaviors using iAssign® Technology and the Ventis® Pro Multi-Gas Monitor. iAssign® Beacons and iAssign® Tags make it easy to automatically track what’s happening on a worksite and interpret gas detection data without the need for wireless connectivity. iAssign Beacons automatically assign site names to Ventis Pro monitors based on proximity, helping safety managers to make sense of datalog information. Using Bluetooth technology, iAssign Beacons provide an added layer of safety and security by alerting users when they have entered restricted or dangerous areas. iAssign Tags allow workers to manually “tap in” and “tap out” of a location which allows anyone reviewing the data to easily see who had the instrument and where the operator was using it, making the information more actionable.
Screenshots
Verdict
The clearest difference is rating: iAssign at 5.0 against TWIC ADVISR's 3.7. iAssign also leads on update cadence (every 4 months vs every 8 months). TWIC ADVISR's advantage is ratings volume (9 vs 2) and iOS requirement (11.0 vs 16.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iAssign holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 9 and 2 respectively.
TWIC ADVISR ships an update every 8 months, iAssign every 4 months. The most recent releases landed on June 1, 2026 and June 4, 2026 respectively.
| Parameter | TWIC ADVISR | iAssign |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (9 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 9 — better | 2 |
| Update frequency | Every 8 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 42 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Kibong Lee | Industrial Scientific |
Customer experience
TWIC ADVISR
iAssign
In-app purchases
TWIC ADVISR
No in-app purchases
iAssign
No in-app purchases









