# Countdown Stack vs Synto

The clearest difference is in-app purchases: Synto at none against Countdown Stack's 2. Synto also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (15.1 vs 26.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Countdown Stack sells 2 in-app purchases, starting at $0.29 per month. Synto asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Countdown Stack against 5.0 for Synto. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Countdown Stack ships an update every 2 months, Synto every 3 weeks. The most recent releases landed on September 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Countdown Stack | Synto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/countdown-stack/id6745722215/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/synto/id6757703408/reviews) |
| Number of ratings | **5** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 33 MB | 72 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitry Khotinskiy](https://appshunter.io/developer/1603030256) | [DJP TECHNOLOGY LTDA](https://appshunter.io/developer/1673757667) |

## What reviewers say

### Countdown Stack

[App page](https://appshunter.io/ios/app/countdown-stack/id6745722215)

Easily track important upcoming events and personal goals. This app provides a clean interface to visualize your milestones, from birthdays to deadlines, across all your Apple devices. Unlock unlimited tracking and advanced features with an in-app purchase.

**Highlights:** Event and goal tracking, Clean and modern interface, Cross-device synchronization, Beautifully displayed countdowns, Unlimited countdowns (in-app purchase)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $0.29 | per month |
| Premium (Annual) | $2.49 | per year |


### Synto

[App page](https://appshunter.io/ios/app/synto/id6757703408)

Access leading AI models for specialized assistance in education, career, business, and personal organization. Engage in natural conversations with AI tailored to your needs, all within a user-friendly interface that prioritizes your data privacy.

**Highlights:** Access multiple advanced AI models, Specialized AI assistants, Natural language conversation, Data privacy and security, User-friendly interface, Free to try

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

**In-app purchases:** none


## Frequently asked questions

### Is Countdown Stack free?

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

### Is Synto free?

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

### Which has better reviews, Countdown Stack or Synto?

Countdown Stack and Synto are both rated 5.0 out of 5 on the App Store, from 5 and 2 ratings respectively.

### Do Countdown Stack or Synto have ads?

Neither Countdown Stack nor Synto shows ads.

### Which is updated more often, Countdown Stack or Synto?

Countdown Stack ships an update every 2 months, and Synto every 3 weeks. Most recently, Countdown Stack was updated on September 24, 2026 and Synto on October 12, 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.*