Comparison

T vs 1SIM IoT

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

Head to head
About

T

This app allows T-Mobile customers to use their phone number across multiple devices, including smartphones, tablets, and computers. It enables managing calls, texts, and voicemails from various devices, and supports using multiple numbers on a single device or one number across many.

Highlights
  • Use phone number on multiple devices
  • Make and receive calls
  • Send and receive text messages
  • Check voicemail
  • Manage multiple numbers
  • Separate work and personal lines
Read full description

T-Mobile DIGITS is an application that gives T-Mobile customers the power to leverage your phone number on all your devices, including smartphone, tablet, laptop and desktop computers, plus wearable devices. DIGITS empowers T-Mobile customers to utilize up to five phone numbers on a single device or multiple devices all with the same number so that you can receive calls from work, home, and more, all in one place. DIGITS is ideal for: • Small businesses – keep work and personal separate, plus share your work line • Home phone replacement – contact all family members anytime, anywhere • Teams & clubs – Contact your coaches, leaders, and teammates at the touch of a button • Privacy shield – use for online shopping or social apps Use DIGITS to: • Make and receive voice calls • Send and receive text messages • Check voicemail • See missed calls

About

1SIM IoT

Manage your IoT/M2M devices remotely with real-time data on usage, connectivity, and spending limits. This app provides essential control over your SIM cards and devices, ensuring efficient management for various applications like asset tracking and smart homes.

Highlights
  • Real-time device status
  • Data and SMS usage tracking
  • Set monthly spending limits
  • Block/unblock mobile data
  • Two-way device communication
  • Account access controls
Features
Read full description

The new OneSimCard IoT-M2M app enables you to get access to the most important functions of the OneSimCard OSCAR management platform virtually anywhere you have connectivity on your mobile device or tablet. Whether your solution is for GPS (asset tracking, fleet management, people tracking, etc.), wearables, Smart meters/Smart City, Smart Home or any other Internet of Things/Machine to Machine application, the OSCAR (OneSimCard Account Resource) app allows you to easily manage all of your mobile IoT/M2M devices. The OSCAR IOT app provides you with real time information about all active, blocked or deactivated devices, network registration/connectivity status, and the current data and SMS use records. It also allows you to reconnect the device to the network if required, as well as 2-way communication to the device using Portal SMS option, which keeps logs of all sent commands to, and replies from, the device including the APN settings. The app allows you to have access to each sim card /device, set the monthly spending limit for the SIM, block/unblock mobile data, view the amount of data used in the billing cycle anywhere, anytime your mobile device is connected to the internet. The app allows for separate logins of account administrators to share or to limit various account access functions. The in-app help tools provide quick access to troubleshooting and customer support.

Screenshots

T4 screens
1SIM IoT4 screens

Verdict

The call

The clearest difference is rating: 1SIM IoT at 5.0 against T's 1.5. 1SIM IoT also leads on update cadence (daily vs every 6 weeks). T's advantage is ratings volume (724 vs 1) and device support (4 vs 2). 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.

ReceptionRating · Positive reviews · Number of ratings

1SIM IoT holds the better App Store score, 5.0 against 1.5. That said, the two scores are not equally well evidenced: T has 724 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

T ships an update every 6 weeks, 1SIM IoT daily. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
T versus 1SIM IoT: the parameters behind the verdict, then further details
ParameterT1SIM IoT
PriceFreeFree
Rating1.5 (724 ratings)5.0 (1 ratings) — better
Positive reviews6.5% of reviews—
Number of ratings724 — better1
Update frequencyEvery 6 weeksDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size97 MB7 MB
Age rating4+4+
DeveloperT-MobileBelmont Telecom, Inc.

Customer experience

T

All ratings520 ratings
Positive10.4%
Neutral2.3%
Negative87.3%
Written reviews402 reviews
Positive6.5%
Neutral3.7%
Negative89.8%

1SIM IoT

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

T

Reported bugs

4 issues
  • Login issues
  • Disappearing messages
  • Inconsistent call/text delivery
  • Outdated/buggy app versions

Requested features

5 requests
  • Dark mode option
  • Improved contact management
  • Reliable notifications
  • Seamless multi-device sync
  • Better call quality

1SIM IoT

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

T

No in-app purchases

None

1SIM IoT

No in-app purchases

Questions

Is T free?
T is free to download, with no in-app purchases.
Is 1SIM IoT free?
1SIM IoT is free to download, with no in-app purchases.
Which has better reviews, T or 1SIM IoT?
1SIM IoT is rated higher. T averages 1.5 out of 5 from 724 ratings, while 1SIM IoT averages 5.0 from 1 ratings.
Do T or 1SIM IoT have ads?
Neither T nor 1SIM IoT shows ads.
Which is updated more often, T or 1SIM IoT?
T ships an update every 6 weeks, and 1SIM IoT daily. Most recently, T was updated on November 11, 2026 and 1SIM IoT on November 3, 2026.

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