# i甲专线 vs Thyroid Tracker

The clearest difference is update cadence: Thyroid Tracker at every 4 days against i甲专线's every 3 weeks. i甲专线's advantage is iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. i甲专线 sells 5 one-off in-app purchases and Thyroid Tracker sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

i甲专线 ships an update every 3 weeks, Thyroid Tracker every 4 days. The most recent releases landed on September 12, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | i甲专线 | Thyroid Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 205 MB | 38 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Aijia Zhuanxian Health Management Co.Ltd](https://appshunter.io/developer/1822498682) | [Chengdu Xingguan Technology Co., Ltd.](https://appshunter.io/developer/998279524) |

## What reviewers say

### i甲专线

[App page](https://appshunter.io/ios/app/i/id1485684120)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 结节服务包 | $0.99 | one-time |
| 爱甲福 | $46.99 | one-time |
| 重医附一随访群课程 | $46.99 | one-time |
| 甲状腺术后正念疗愈 | $59.99 | one-time |
| 爱甲康 | $109.99 | one-time |


### Thyroid Tracker

[App page](https://appshunter.io/ios/app/thyroid-tracker-hormone-log/id6753612177)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $5.99 | per year |
| Lifetime | $15.00 | one-time |


## Frequently asked questions

### Is i甲专线 free?

i甲专线 is free to download, with in-app purchases available.

### Is Thyroid Tracker free?

Thyroid Tracker is free to download, with in-app purchases available.

### Do i甲专线 or Thyroid Tracker have ads?

Neither i甲专线 nor Thyroid Tracker shows ads.

### Which is updated more often, i甲专线 or Thyroid Tracker?

i甲专线 ships an update every 3 weeks, and Thyroid Tracker every 4 days. Most recently, i甲专线 was updated on September 12, 2026 and Thyroid Tracker on September 5, 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.*