# T vs Cardzilla

The clearest difference is review sentiment: Cardzilla at 91% against T's 16%. Cardzilla also leads on rating (4.5 vs 3.1) and update cadence (every 4 weeks vs every 3 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Cardzilla holds the better App Store score, 4.5 against 3.1. Both are backed by a comparable volume of ratings — 88 and 87 respectively. Written reviews point the same way: 16% of T's written reviews are positive against 91% of Cardzilla's.

T ships an update every 3 months, Cardzilla every 4 weeks. Both last shipped on October 23, 2026.

## The numbers

| Metric | T | Cardzilla |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (88 ratings)](https://appshunter.io/ios/app/t-mobile-ip-relay/id542802329/reviews) | **[4.5 (87 ratings)](https://appshunter.io/ios/app/cardzilla/id623346823/reviews)** |
| Number of ratings | **88** | 87 |
| Positive reviews | 16.4% of reviews | **91.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 15 MB | 3 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [T-Mobile](https://appshunter.io/developer/525560781) | [Tim Kettering](https://appshunter.io/developer/623346826) |

## What reviewers say

### T

[App page](https://appshunter.io/ios/app/t-mobile-ip-relay/id542802329)

This app enables individuals who are Deaf, Hard of Hearing, DeafBlind, or have a Speech Disability to make and receive relay calls using text over the internet. It connects users with a qualified relay operator and offers features like an integrated contact list and call history.

**Highlights:** Text-based relay calls, Integrated contact list, Call history, Access to live customer care, Available on wireless networks

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Accessible for DeafBlind
- 👍 Can save conversations
- 👍 Live operator accuracy
- 👍 App updated for easier call shifting
- 👍 Good for Spasmodic Dysphonia

**What reviewers complain about**

- 🐛 Lots of bugs
- 🐛 Calls get dropped
- 🐛 Fake number calls
- 🐛 App not updated
- 🐛 App broken, cannot make calls

**Reported bugs**

- App still has LOT of bugs
- Calls get dropped
- Line is busy error
- Hackers fake number calls
- App hasn't been updated

**Requested features**

- Ability to report spam callers
- Send words automatically as I type
- Add ability to block numbers
- Option to subscribe to spam call blocking service
- Make browser and app interfaces more similar


### Cardzilla

[App page](https://appshunter.io/ios/app/cardzilla/id623346823)

Display your messages in large, clear text for easy reading across distances. This app offers a no-scroll design that automatically resizes text as you type, saving all your cards automatically. It's ideal for silent communication or grabbing attention without sound.

**Highlights:** Large and clear text display, Automatic text resizing, No scroll design, Automatic card saving, Save favorite messages, Quick swipe navigation, Shake to save and erase

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and intuitive interface
- 🚀 Fast and efficient communication
- 💡 Invaluable for users with speech/hearing impairments
- 👍 Large, readable text display
- 👍 Automatic saving of history

**What reviewers complain about**

- 🐛 Speech-to-text can be slow
- 🐛 Microphone turns off too quickly
- 🐛 Lack of language translation
- 🐛 No clear way to contact developer
- 🐛 Shake-to-erase can be accidentally triggered

**Reported bugs**

- Crashes on two-finger swipe up (iPad Air 2, iOS 11.2)
- App no longer has mic icon (reported in 2019)
- Notes lost when switching apps (reported in 2020, contradicted by other reviews)

**Requested features**

- On-screen keyboard visibility toggle
- Adaptive text size options (fixed or auto-overflow)
- Language translator
- Setting for microphone to stay on
- Option to disable shake-to-erase


## Frequently asked questions

### Is T free?

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

### Is Cardzilla free?

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

### Which has better reviews, T or Cardzilla?

Cardzilla is rated higher. T averages 3.1 out of 5 from 88 ratings, while Cardzilla averages 4.5 from 87 ratings.

### Do T or Cardzilla have ads?

Neither T nor Cardzilla shows ads.

### Which is updated more often, T or Cardzilla?

T ships an update every 3 months, and Cardzilla every 4 weeks. Most recently, T was updated on October 23, 2026 and Cardzilla on October 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*