Simple ToDo Diary vs Nudidoo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple ToDo Diary
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Simple ToDo Diary is an easy-to-use app for managing daily tasks and notes. You can write quick memos, manage your to-do list, and check off completed tasks. It also works as a light daily diary to record small moments. Designed to be simple, clean, and stress-free for everyday use.
Nudidoo
This app helps you achieve your dreams by breaking them down into small, manageable daily actions. It uses a gamified approach with virtual companions and rewards to encourage consistent progress and habit building.
- Create and break down goals into small actions
- Virtual companions that grow with your progress
- Daily task checking and rewards
- Decorate a virtual aquarium with earned rewards
- Track progress and complete goals
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Too many things you want to do, but somehow you keep putting them off. Nudidoo is an app that helps you keep going with small daily actions. Made for those who overthink and find it hard to start. “Just one small step today is enough.” Instead of complicated plans, try doing just one small thing today. *This app is currently available in Korean only. ● Create Goals Break down your goals into small, simple actions. ● Be with Nudis When you create a goal, a “Nudi” comes to your aquarium. It grows alongside your dream. ● Daily Candy Check Complete one small action and check it off. Small records build meaningful progress. ● Do It Today, Shine Brighter If you complete today’s task on the same day, you’ll receive a shining candy. ● Decorate Your Aquarium Collect shining candies and decorate your own aquarium. Relax and enjoy the calming underwater atmosphere. ● Complete Your Goal When you finish a goal, send your Nudi off to the sea and keep it as your journey. Recommended for you › You make plans but often put them off › You want to build habits without pressure › You enjoy cute and emotional ways of tracking progress › You have many dreams but struggle to start
Screenshots
Verdict
The clearest difference is in-app purchases: Nudidoo at none against Simple ToDo Diary's 1. Nudidoo also leads on iOS requirement (15.1 vs 18.6). Simple ToDo Diary's advantage is update cadence (daily vs every 4 days). On price, ads 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
Both are free to download. Simple ToDo Diary sells 1 one-off in-app purchase. Nudidoo asks for nothing beyond the download.
Simple ToDo Diary ships an update daily, Nudidoo every 4 days. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.
| Parameter | Simple ToDo Diary | Nudidoo |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Daily — better | Every 4 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 4 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Kazuya Hashimoto | JEONGWON GO |
In-app purchases
Simple ToDo Diary
- 広告を非表示にする$1.99
Nudidoo
No in-app purchases
