Simeio Authenticator vs CallGrid
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Simeio Authenticator
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Multi-factor authentication (MFA) is a security system that verifies a userβs identity by requiring multiple credentials. It is a critical component of identity and access management (IAM). Rather than just asking for a username and password, MFA requires otherβadditionalβcredentials, such as a code /action from the userβs smartphone and biometric recognition. Simeio Authenticator app, even if someone manages to obtain your password, they won't be able to access your accounts without also having access to your smartphone to take the required action(Accept/Reject). This significantly enhances the security of your online accounts. When you register your account, you link it to a mobile device you own. Afterward, whenever you try to log in to your account it sends a push auth request to the associated device for confirmation. you can accept or deny the auth request. Push authentication is a mobile-centric authentication whereby the service provider sends the user a notification over the most secure available communication channel. The user responds to the challenge by acting to verify their identity and access the service. Note: While we are building the app for a specific organization(a local government) as a business, the app itself is going to be available to the general public which that government is providing to the citizens of the state, and not restricted to only employees and partners of the organization.
CallGrid
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CallGrid is the companion app for medical residents using the CallGrid scheduling platform. Stay on top of your call schedule, coordinate swaps with co-residents, and manage time-off requests β all from your phone. Your Schedule, At a Glance See your upcoming call assignments and service rotations in one place. Your next call is always front and center, with service blocks showing your current and upcoming rotations along with your team members. Who's On Call? Quickly check which residents are on call for any date. Swipe through the week or jump to a specific day β no more texting around to find coverage. Swap Requests Made Simple Need to trade a call day? Pick your slot, choose a co-resident (or post an open swap for anyone to claim), and optionally target a specific day. Add a note and submit β your co-resident and chief are notified instantly. Time-Off Requests Request vacation, no-call days, or other time off directly from the app. See your remaining balance, pick dates on the calendar, and check for schedule conflicts before submitting. Share Your Schedule Generate a secure, expiring link to share your schedule with family, significant others, or anyone who needs to know when you're on call. Stay in the Loop Get notified when schedules are published, swap requests come in, or your time-off is approved. Never be caught off guard by a schedule change. Features: β’ View call and shift schedules with service rotations β’ See who's on call for any date β’ Create and manage swap requests β’ Request time off with real-time balance tracking β’ Share your schedule via secure links β’ Dark and light theme support β’ Sign in with Apple, Google, or email CallGrid requires an active account on a CallGrid-powered residency program. Contact your program administrator to get started.
Screenshots
Verdict
The clearest difference is iOS requirement: Simeio Authenticator at 13.0 against CallGrid's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Simeio Authenticator ships an update fortnightly, CallGrid every 4 weeks. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.
| Parameter | Simeio Authenticator | CallGrid |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly β better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod β better |
| Requires iOS | 13.0 β better | 15.1 |
| Further details β not scored | ||
| Size | 9 MB | 32 MB |
| Age rating | 17+ | 4+ |
| Developer | Simeio Solutions, LLC | Stephen Gregg |
In-app purchases
Simeio Authenticator
No in-app purchases
CallGrid
No in-app purchases
Questions
Is Simeio Authenticator free?
Is CallGrid free?
Do Simeio Authenticator or CallGrid have ads?
Which is updated more often, Simeio Authenticator or CallGrid?
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