# POPLENS vs Simple ToDo Diary

The clearest difference is in-app purchases: POPLENS at none against Simple ToDo Diary's 1. POPLENS also leads on iOS requirement (15.1 vs 18.6). Simple ToDo Diary's advantage is update cadence (daily vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Simple ToDo Diary sells 1 one-off in-app purchase. POPLENS asks for nothing beyond the download.

POPLENS ships an update monthly, Simple ToDo Diary daily. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | POPLENS | Simple ToDo Diary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 15.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | Free | — |
| Size | 23 MB | 4 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [STARVISION CO., LTD.](https://appshunter.io/developer/1127712200) | [Kazuya Hashimoto](https://appshunter.io/developer/1857972259) |

## What reviewers say

### POPLENS

[App page](https://appshunter.io/ios/app/poplens/id1471096928)

Shop for over 500 types of safe colored contact lenses, made with sandwich technology and approved as medical devices. Discover new arrivals, sales, and popular styles with push notifications and exclusive coupons. Get K-pop idol-worn lens info and expert advice.

**Highlights:** Over 500 diverse lens types, Safe, medical-grade lenses, New product & sale notifications, Monthly popularity rankings, Exclusive app coupons, SNS login integration, K-pop idol-worn lens info

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Simple ToDo Diary

[App page](https://appshunter.io/ios/app/simple-todo-diary/id6756016949)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を非表示にする | $1.99 | one-time |


## Frequently asked questions

### Is POPLENS free?

POPLENS is free to download, with no in-app purchases.

### Is Simple ToDo Diary free?

Simple ToDo Diary is free to download, with in-app purchases available.

### Do POPLENS or Simple ToDo Diary have ads?

Neither POPLENS nor Simple ToDo Diary shows ads.

### Which is updated more often, POPLENS or Simple ToDo Diary?

POPLENS ships an update monthly, and Simple ToDo Diary daily. Most recently, POPLENS was updated on October 14, 2026 and Simple ToDo Diary on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*