AtoDays vs Aqua_Smart

How many days left until your big day? AtoDays counts down to your events and anniversaries. AtoDays is a simple and intuitive app that tracks the remaining days until your birthdays, exams, and special events. With seamless calendar integration, you can start counting down without any manual entry. Check your important dates anytime with Home & Lock Screen widgets and timely notifications. Key Features - Automatic countdown to any date - Stay informed with custom notifications - One-tap update to the next date with repeat settings - One-tap event import from your Calendar - Display Calendar events as countdowns automatically - Home & Lock Screen widgets for instant tracking - Secure data backup via iCloud Perfect For - Counting down to birthdays and anniversaries - Tracking vacations, concerts, or game releases - Managing deadlines for exams, certifications, and work projects Pro Version Features - Ad-free experience - Unlimited event tracking - Pro Widgets (always show selected events) - Direct Calendar sync for real-time countdowns

Supports aquarium maintenance. You can name and manage up to 10 aquariums. Displays the time to change the water, the time to clean the filter, and the quality of water (pH, TDS, NH3, etc.). Quality criteria can be set individually for each aquarium. Results can be sent by e-mail after maintenance. After learning how to use it, you can also enjoy a slideshow with your aquarium photos. Items that can be managed are as follows. - Filter maintenance: date and time, elapsed days, two-stage alarm - Water exchange: date and time, elapsed days, two-stage alarm - PH: Measurement date and time, measured value, lower limit, upper limit - TDS: Measurement date and time, measurement value, 2 levels of alarm level - NH3: Measurement date and time, measurement value, 2 levels of alarm level - HNO2: Measurement date and time, measurement value, 2 levels of alarm level - HNO3: Measurement date and time, measurement value, 2 levels of alarm level - launch: date and time, elapsed days, memo 1, memo 2 - Reserve 1-3: Date and time, elapsed days, memo 1, memo 2 - Reserve 1-3 (with alarm): Date and time, number of days elapsed, memo 1, number of alarm days - Aquarium volume calculation: width, depth, height - Salt bath salt content calculation: salt content, aquarium volume, salt concentration - Calculation of medicinal bath dosage: dosage, aquarium volume, instruction hydrological quantity, instruction dosage