# SumDU vs Countdown Reminder

The clearest difference is in-app purchases: SumDU at none against Countdown Reminder's 1. SumDU also leads on ads (none vs shown) and iOS requirement (12.1 vs 15.0). Countdown Reminder's advantage is update cadence (monthly vs every 8 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. Countdown Reminder sells 1 one-off in-app purchase. SumDU asks for nothing beyond the download.

SumDU ships an update every 8 months, Countdown Reminder monthly. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SumDU | Countdown Reminder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sumdu/id698235283/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 14 MB | 27 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [App Dev Academy Ltd.](https://appshunter.io/developer/1281918813) | [Nikita Benin](https://appshunter.io/developer/1454416348) |

## What reviewers say

### SumDU

[App page](https://appshunter.io/ios/app/sumdu/id698235283)

Access your university schedule, including classes, professors, and rooms, all in one convenient app. Download your schedule for offline use and sync it with your device's calendar to avoid missing appointments.

**Highlights:** University schedule access, Professor and auditorium schedules, Offline schedule download, Calendar integration, Schedule for all groups

**In-app purchases:** none


### Countdown Reminder

[App page](https://appshunter.io/ios/app/countdown-reminder-soon/id1454416349)

Never forget an important date again with this beautifully designed countdown and reminder app. Create personalized countdowns for birthdays, anniversaries, and holidays with custom titles and reminders. Organize events with hashtags and track time effortlessly.

**Highlights:** Personalized countdowns, Custom titles and reminders, Event organization with hashtags, Time tracking (days left/passed), Event editing and updating, Gradient color customization

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove advertisements | $0.99 | one-time |


## Frequently asked questions

### Is SumDU free?

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

### Is Countdown Reminder free?

Countdown Reminder is free to download, with in-app purchases available.

### Do SumDU or Countdown Reminder have ads?

Countdown Reminder shows ads; SumDU does not.

### Which is updated more often, SumDU or Countdown Reminder?

SumDU ships an update every 8 months, and Countdown Reminder monthly. Most recently, SumDU was updated on October 15, 2026 and Countdown Reminder on October 13, 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.*