# 道德经 vs Plan Flow Meter

The clearest difference is ads: Plan Flow Meter at none against 道德经's shown. 道德经's advantage is update cadence (every 6 weeks vs every 12 months) and iOS requirement (15.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

道德经 ships an update every 6 weeks, Plan Flow Meter every 12 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 道德经 | Plan Flow Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (29 ratings)](https://appshunter.io/ios/app/id1535920590/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 12 months |
| Monetization | Ad-supported | — |
| Size | 57 MB | 15 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [浩杰 姬](https://appshunter.io/developer/1514456091) | [雨杨 陈](https://appshunter.io/developer/1318810771) |

## What reviewers say

### 道德经

[App page](https://appshunter.io/ios/app/id1535920590)

Explore the profound philosophy of the Tao Te Ching, a foundational text of Taoism. This app offers rich content, a user-friendly interface, and comprehensive analysis of this ancient masterpiece, making it accessible to all.

**Highlights:** Rich and engaging content, Comprehensive analysis, User-friendly interface, Free to access, Exploration of Taoist philosophy

**Features:** macOS Compatibility

**In-app purchases:** none


### Plan Flow Meter

[App page](https://appshunter.io/ios/app/plan-flow-meter/id6751126870)

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

**In-app purchases:** none


## Frequently asked questions

### Is 道德经 free?

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

### Is Plan Flow Meter free?

Plan Flow Meter is free to download, with no in-app purchases.

### Do 道德经 or Plan Flow Meter have ads?

道德经 shows ads; Plan Flow Meter does not.

### Which is updated more often, 道德经 or Plan Flow Meter?

道德经 ships an update every 6 weeks, and Plan Flow Meter every 12 months. Most recently, 道德经 was updated on October 24, 2026 and Plan Flow Meter on October 25, 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.*