Comparison

Rainfall Calculator vs Daylist

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

Head to head
About

Rainfall Calculator

Calculate potential rainwater harvest volume and cost savings. This tool helps determine annual water collection capacity based on rainfall and roof area, recommending optimal tank sizes for efficient water storage. It also allows for cost-saving analysis by comparing harvested water to mains water prices.

Highlights
  • Instant rainwater calculation
  • Cost savings evaluation
  • Minimum tank size recommendation
  • Supports various input units
  • Formula references included
  • Results copyable to other apps
Features
Read full description

The Rainfall Calculator is a physics/math tool designed to help you determine how many liters/gallons of rainwater you can harvest per year, evaluate cost savings, and recommend the minimum tank size for water storage. Features: - Instant calculation. - Results can be copied to other apps. - Includes formula references. - Supports up to 16 decimal places. - Supports various units for each input. - Works seamlessly on both iPhone and iPad. - Lightweight, compact app optimized for everyday use. - Ad-free and built with privacy in mind. Rainwater Collection Calculator: - The catchment area is multiplied by the depth of rain that falls on it to give the total volume of water produced. - 1 millimeter of rain over 1 square meter of roof equals 1 liter of water. - Annual rainfall (in millimeters) x Roof surface area (in square meters) = Roof catchment capacity. - You can add the cost of mains or tap water per m³ to evaluate the annual cost savings if this rainwater is collected and used instead of drinking water. - The minimum tank size should store 33% of the "Annual Rainfall On Your Roof Area" as you will use the water while you are collecting it. The rain will collect in gutters that channel the water into downspouts and then into some sort of storage vessel. Rainwater collection systems can be as simple as collecting rain in a rain barrel or as elaborate as harvesting rainwater into large cisterns to supply your entire household demand. You can also collect rainwater for garden use. Plants prefer rainwater because it's naturally soft and free of chlorine and other chemicals. If drought is a problem where you live, collecting rainwater is a good way to handle watering restrictions. If you're on a municipal water system, you can save a considerable amount of money. Thank you for your support! Visit nitrio.com for more apps for your iOS devices.

About

Daylist

Create simple daily to-do lists with optional reminders. Tasks can be easily checked off when completed. Enjoy a fresh start each day with a minimalistic and private experience.

Highlights
  • Create daily to-do lists
  • Add tasks with one tap
  • Set task reminders
  • Check off completed tasks
  • No ads or signup required
  • Daily fresh start
Features
Read full description

The simplest and smoothest todo list for daily tasks. - No ads - No signup required - No subscription or payments How do you use Daylist? 1. Create lists for today with one tap - Grocery shopping, work tasks or anything else. 2. Write down the tasks you’d like to get done 3. Want to be reminded of a task? No problem, just another tap for that. 4. When you’re done with your task, check it off in the app. You’re going to love this step ;) You’ll have a fresh start each day - no need to manage long term lists. That’s it, nothing more, nothing less. Daily lists, as minimalistic and smooth as it gets. NO SIGNUP OR SPAM You just get right into the app. We don’t need to know your email or anything else for that matter. Also, anything you enter in the app stays right there, we don’t send your data to god knows where. Privacy first! NO SUBSCRIPTIONS Try the app for a week, and if it’s what you’re looking for, then you can continue using it forever with a one time purchase. Oh yea, no ads either. If you’re not sold by now, just give it a go. The app does a way better job of showing how wonderful todo lists can be than I can describe in text.

Screenshots

Rainfall Calculator4 screens
Daylist3 screens

Verdict

The call

The clearest difference is price: Daylist at Free against Rainfall Calculator's $2.99. Daylist also leads on update cadence (every 9 days vs every 29 months) and ratings volume (88 vs 1). Rainfall Calculator's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.7). On ads 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

Daylist is free to download; Rainfall Calculator costs $2.99 up front. Daylist sells 1 one-off in-app purchase. Rainfall Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Rainfall Calculator holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Daylist has 88 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Rainfall Calculator ships an update every 29 months, Daylist every 9 days. Both last shipped on November 2, 2026.

Scorecard8 real differences · 2 level
Rainfall Calculator versus Daylist: the parameters behind the verdict, then further details
ParameterRainfall CalculatorDaylist
Price$2.99Free — better
Rating5.0 (1 ratings) — better4.7 (88 ratings)
Positive reviews—69.4% of reviews
Number of ratings188 — better
Update frequencyEvery 29 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13 — better17.6
Further details — not scored
Size1 MB5 MB
Age rating4+4+
DeveloperNitrioBuddy Budgeting AB

Customer experience

Rainfall Calculator

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

Daylist

All ratings88 ratings
Positive92.0%
Neutral3.4%
Negative4.5%
Written reviews111 reviews
Positive69.4%
Neutral12.6%
Negative18.0%

In-app purchases

None

Rainfall Calculator

No in-app purchases

1 purchases

Daylist

One-time1
  • Daylist Lifetime Unlocked$4.99

Questions

Is Rainfall Calculator free?
Rainfall Calculator costs $2.99, with no in-app purchases.
Is Daylist free?
Daylist is free to download, with in-app purchases available.
Which has better reviews, Rainfall Calculator or Daylist?
Rainfall Calculator is rated higher. Rainfall Calculator averages 5.0 out of 5 from 1 ratings, while Daylist averages 4.7 from 88 ratings.
Do Rainfall Calculator or Daylist have ads?
Neither Rainfall Calculator nor Daylist shows ads.
Which is updated more often, Rainfall Calculator or Daylist?
Rainfall Calculator ships an update every 29 months, and Daylist every 9 days. Most recently, Rainfall Calculator was updated on November 2, 2026 and Daylist on November 2, 2026.

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