# iApp ChindaGo vs Sundial Time Marks

The clearest difference is in-app purchases: iApp ChindaGo at none against Sundial Time Marks's 3. Sundial Time Marks's advantage is update cadence (every 9 days vs every 11 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Sundial Time Marks sells 3 in-app purchases, starting at $0.99 per month. iApp ChindaGo asks for nothing beyond the download.

iApp ChindaGo ships an update every 11 months, Sundial Time Marks every 9 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | iApp ChindaGo | Sundial Time Marks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sundial-time-marks/id6807945181/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 92.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 38 MB | 33 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 9+ | 4+ |
| Developer | [I APP TECHNOLOGY COMPANY LIMITED](https://appshunter.io/developer/1254738585) | [婉 唐](https://appshunter.io/developer/1555503576) |

## What reviewers say

### iApp ChindaGo

[App page](https://appshunter.io/ios/app/iapp-chindago/id6749865815)

**In-app purchases:** none


### Sundial Time Marks

[App page](https://appshunter.io/ios/app/sundial-time-marks/id6807945181)

Visualize your progress through natural cycles like days, weeks, years, and your lifetime with customizable widgets. See where you stand at a glance with visual marks representing past, present, and future. Your data remains private and synced across devices.

**Highlights:** Visualize time across natural cycles, Home Screen and Lock Screen widgets, Lifetime progress visualization, Customizable styles and palettes, Private iCloud synchronization, Monthly year-progress notifications

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sundial Pro Monthly | $0.99 | per month |
| Sundial Pro Yearly | $6.99 | per year |
| Sundial Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is iApp ChindaGo free?

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

### Is Sundial Time Marks free?

Sundial Time Marks is free to download, with in-app purchases available.

### Do iApp ChindaGo or Sundial Time Marks have ads?

Neither iApp ChindaGo nor Sundial Time Marks shows ads.

### Which is updated more often, iApp ChindaGo or Sundial Time Marks?

iApp ChindaGo ships an update every 11 months, and Sundial Time Marks every 9 days. Most recently, iApp ChindaGo was updated on October 30, 2026 and Sundial Time Marks on October 31, 2026.

---

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