Comparison

Twixl Viewer Classic vs GemTot SDK

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

Head to head
About

Twixl Viewer Classic

Features
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The Twixl Viewer Classic allows you to preview interactive and enriched content created on your computer with Adobe InDesign® and the Twixl Publisher plug-in. After creating a publication, a designer can push the content to this app from the Twixl Publisher plug-in. How it works: When you have created an interactive publication using InDesign and the Twixl Publisher plug-in, the "Preview on device" option in the plug-in allows you to generate a preview of your publication, and send it to an iPad connected to the local network. Open this "Twixl Viewer" app on your device, then enter the IP address listed in the top right corner of the app window in the Preview Settings of the Twixl Publisher Palette.

About

GemTot SDK

This utility app enables users to configure, test, and demonstrate GemTot Bluetooth beacons. It showcases proximity detection, distance calculation using RSSI, and triggering local notifications or Apple Wallet content when entering or exiting beacon regions.

Highlights
  • Beacon configuration
  • Distance demonstration
  • Proximity detection
  • RSSI and power calibration
  • Lock screen notifications
  • Apple Wallet integration demo
Features
Read full description

This utility app allows owners of GemTot bluetooth beacons to easily configure, test and demonstrate them. Distance demonstration: Demonstrates how an app is aware of a beacon's relative proximity when moving closer or further away from a beacon source and how the RSSI and power calibration of the beacon can be used to calculate a crude distance to the beacon source. Proximity demonstration: Demonstrates how the device's proximity to the beacon can trigger 3 different states (immediate, near and far), also shows how an app can respond to the event of no longer being able to see a beacon. Lock screen demonstration: Demonstrates how entering or exiting a beacon region can trigger a local notification and how a notification could be used to deliver content to Apple Wallet. This demo requires that background location monitoring and local notifications are enabled. Please note that continued use of GPS running in the background can dramatically decrease battery life. This app acts as a tool to demonstrate the capabilities of iBeacon. To save battery life, location permissions should be disabled when the app is not in use.

Screenshots

Twixl Viewer Classic3 screens
GemTot SDK4 screens

Verdict

The call

The clearest difference is update cadence: Twixl Viewer Classic at every 3 weeks against GemTot SDK's every 3 months. GemTot SDK's advantage is iOS requirement (9.0 vs 15.0). On price, ads, 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

Twixl Viewer Classic ships an update every 3 weeks, GemTot SDK every 3 months. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 8 level
Twixl Viewer Classic versus GemTot SDK: the parameters behind the verdict, then further details
ParameterTwixl Viewer ClassicGemTot SDK
PriceFreeFree
Rating—1.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.09.0 — better
Further details — not scored
Size32 MB18 MB
Age rating4+4+
DeveloperTwixl mediaPassKit, Inc.

In-app purchases

None

Twixl Viewer Classic

No in-app purchases

None

GemTot SDK

No in-app purchases

Questions

Is Twixl Viewer Classic free?
Twixl Viewer Classic is free to download, with no in-app purchases.
Is GemTot SDK free?
GemTot SDK is free to download, with no in-app purchases.
Do Twixl Viewer Classic or GemTot SDK have ads?
Neither Twixl Viewer Classic nor GemTot SDK shows ads.
Which is updated more often, Twixl Viewer Classic or GemTot SDK?
Twixl Viewer Classic ships an update every 3 weeks, and GemTot SDK every 3 months. Most recently, Twixl Viewer Classic was updated on October 4, 2026 and GemTot SDK on October 1, 2026.

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