Comparison

Prayminder vs GridCritical Sandbox

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

Head to head
About

Prayminder

This app helps users integrate prayer into their daily lives with gentle reminders and a personal prayer list. It fosters a consistent connection with God throughout the day, allowing users to track answered prayers and maintain a record of gratitude.

Highlights
  • Personal prayer list
  • Daily randomized prayer reminders
  • Scheduled reminders
  • Add notes to prayers
  • Mark prayers as answered
  • Track prayer frequency
Features
Read full description

Prayminder is a calm, beautifully crafted prayer app that makes it simple to pray through the day and turn prayer into a habit. More than 30 million prayer reminders have gone out to people around the world. Add prayers, Scripture, or any words you want to return to, and Prayminder brings them back to you with gentle reminders across your day. It is free, private by design, and works without an account. HOW IT WORKS Write down your prayer topics. Choose how often you want to be reminded. When a reminder arrives, take a moment to pray, then carry on with your day. Over time, those small moments become a rhythm, and you get to make prayer a habit in the middle of a busy everyday life. WHAT YOU CAN DO - Keep your prayers in one place and organize them into groups, such as family, church, or work - Set your own reminder schedule, from a few times a day to whatever suits your life - Read the Bible in the app, with translations provided through YouVersion - Attach Bible verses to your prayers - See a simple record of how your prayer rhythm is growing - Receive reminders reliably, even when your phone has been asleep for hours PRIVATE BY DESIGN Your prayers are personal. They are stored on your phone and never leave your device. You can use the whole app without the need to create an account. The app is free, shows no ads, and your data is yours only. MADE AS A MINISTRY Prayminder is made by Panos and Emma, a husband and wife who have been building it as a ministry since 2017, so that anyone can keep turning back to God in the middle of ordinary days. It is free for everyone and open to Christians of every tradition.

About

GridCritical Sandbox

Features
Read full description

The Voltagy GridCritical Platform is an enterprise-grade emergency response and resource management system designed specifically for utility companies. Built to handle the complex demands of storm response operations, the platform provides comprehensive tools for managing field resources, tracking work orders, and coordinating restoration efforts across large geographic areas.

Screenshots

Prayminder4 screens
GridCritical Sandbox3 screens

Verdict

The call

The clearest difference is update cadence: Prayminder at every 3 weeks against GridCritical Sandbox's every 2 months. GridCritical Sandbox's advantage is iOS requirement (15.0 vs 17.0). 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

Prayminder ships an update every 3 weeks, GridCritical Sandbox every 2 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Prayminder versus GridCritical Sandbox: the parameters behind the verdict, then further details
ParameterPrayminderGridCritical Sandbox
PriceFreeFree
Rating4.9 (4.9K ratings) — better—
Positive reviews96.9% of reviews—
Number of ratings4.9K — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size40 MB76 MB
Age rating4+4+
DeveloperPrayminder ABVoltagy

Bugs and requests

Prayminder

Reported bugs

2 issues
  • Keyboard blocks editing prayers
  • Notifications not always working

Requested features

6 requests
  • Categorize prayers (people, topics, etc.)
  • Customize notification frequency per prayer
  • Track answered prayers separately
  • Search/sort prayers
  • Share prayers with others
Show 1 more
  • Bible verse integration

GridCritical Sandbox

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Prayminder

No in-app purchases

None

GridCritical Sandbox

No in-app purchases

Questions

Is Prayminder free?
Prayminder is free to download, with no in-app purchases.
Is GridCritical Sandbox free?
GridCritical Sandbox is free to download, with no in-app purchases.
Do Prayminder or GridCritical Sandbox have ads?
Neither Prayminder nor GridCritical Sandbox shows ads.
Which is updated more often, Prayminder or GridCritical Sandbox?
Prayminder ships an update every 3 weeks, and GridCritical Sandbox every 2 months. Most recently, Prayminder was updated on November 2, 2026 and GridCritical Sandbox on October 31, 2026.

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