Comparison

Short Term Memory vs WaterCal

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

Head to head
About

Short Term Memory

This app offers a straightforward memory training game designed to help users maintain and improve their cognitive abilities. It features levels that increase in difficulty, challenging players to memorize an expanding number of cute illustrations. It's ideal for intellectual training and potentially preventing cognitive decline.

Highlights
  • Memory improvement exercises
  • Intellectual training
  • Dementia prevention focus
  • Cute illustration memorization
  • Progressive difficulty levels
  • Up to 20 illustrations to memorize
Features
Read full description

◆ What is this game? Memorize the illustrations shown on screen, then pick them out from a large collection — a simple short-term memory test. 130 cute illustrations (animals, food, everyday items, and more) appear as questions. The number of illustrations to memorize increases with each level. ◆ Two Game Modes [Free Mode] - No time limit — play at your own pace - 20 levels (Lv.1: 2 items — Lv.20: 40 items) - Unlimited plays - Track your best times and beat your personal records [Challenge Mode] - Timed test for a real challenge - Play once per day (unlimited with Premium) - Rank system starting from 9th Kyu — how high can you go? ◆ Perfect for - Kids' cognitive development and learning - Adults looking for brain training - Seniors maintaining cognitive function - Anyone wanting to improve short-term memory - A quick daily brain exercise ◆ Features - Simple rules anyone can pick up instantly - Cute illustrations enjoyable for all ages - Calendar view to track your daily progress - Relaxing BGM while you play ◆ Premium Plan (Monthly Subscription) - Unlimited Challenge Mode - All Free Mode levels unlocked - Ad-free experience ◆ Requirements - iOS 15.0 or later Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://ferrety.app/work/memory/terms.html Privacy Policy: https://ferrety.app/privacy-policy/

About

WaterCal

Features
Read full description

Log water and calories in seconds on iPhone and Apple Watch. WaterCal is a deliberately simple way to log two everyday numbers: water and calories. Add an amount in seconds, see today’s progress, and get on with the rest of your day. TWO GOALS. ONE GLANCE. Water and calories appear together in one calm daily view. Clear totals and progress show where you stand without turning each meal or drink into a data-entry project. LOG IT YOUR WAY Use customizable quick amounts for the numbers you enter most, or add an exact value. WaterCal supports ounces and milliliters and lets you choose goals that fit your day. TODAY’S ENTRIES, EASY TO CORRECT Every addition becomes a simple value in today’s list. Delete an incorrect entry or undo an accidental addition. The rest of your day stays intact. CLOSE AT HAND • Log and review entries on iPhone or Apple Watch • Use interactive widgets for quick additions • Put quick-log controls in Control Center • See water, calories, or both through widgets and Watch complications • Use App Shortcuts to make common logging actions even faster GENTLE WATER REMINDERS Choose a simple daytime schedule when you want a nudge to drink water. WaterCal uses one reminder across iPhone and Apple Watch, and reminders also work when you use either app on its own. IPHONE AND WATCH, TOGETHER Log from either device. Your entries sync between iPhone and Apple Watch when they reconnect, including changes made while they were apart. A FRESH DAY, AUTOMATICALLY WaterCal focuses on today. When the date changes, the daily view starts clean while your goals and preferred quick amounts remain ready. PRIVATE AND ACCOUNT-FREE WaterCal does not require an account, and Nicely Dressed Code does not collect your tracking entries. Your data stays on your devices. No food database. No charts to maintain. No extra ceremony. Just enough tracking to stay aware.

Screenshots

Short Term Memory3 screens
WaterCal4 screens

Verdict

The call

The clearest difference is price: Short Term Memory at Free against WaterCal's $0.99. Short Term Memory also leads on iOS requirement (15.0 vs 18.6). WaterCal's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence 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

Short Term Memory is free to download; WaterCal costs $0.99 up front. Short Term Memory sells 1 in-app purchase, starting at $0.99 per month. WaterCal asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
Short Term Memory versus WaterCal: the parameters behind the verdict, then further details
ParameterShort Term MemoryWaterCal
PriceFree — better$0.99
Rating4.4 (1.1K ratings) — better—
Positive reviews70.0% of reviews—
Number of ratings1.1K — better—
Update frequencyEvery 4 monthsEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.0 — better18.6
Further details — not scored
Size164 MB9 MB
Age rating4+4+
Developerferrety inc.Nicely Dressed Code

Bugs and requests

Short Term Memory

Reported bugs

3 issues
  • Images from previous screen not appearing in find screen
  • Timer issues
  • Scrolling problems causing accidental taps

Requested features

3 requests
  • More customization options
  • Ad-free paid version
  • Improved graphics

WaterCal

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Short Term Memory

Subscriptions1
  • Premium Plan$0.991 Month
None

WaterCal

No in-app purchases

Questions

Is Short Term Memory free?
Short Term Memory is free to download, with in-app purchases available.
Is WaterCal free?
WaterCal costs $0.99, with no in-app purchases.
Do Short Term Memory or WaterCal have ads?
Short Term Memory shows ads; WaterCal does not.
Which is updated more often, Short Term Memory or WaterCal?
Short Term Memory ships an update every 4 months, and WaterCal every 4 months. Most recently, Short Term Memory was updated on October 20, 2026 and WaterCal on October 12, 2026.

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