# Pregnancy Timing Chart vs Thermometer Log

The clearest difference is review sentiment: Thermometer Log at 50% against Pregnancy Timing Chart's 0%. Thermometer Log also leads on price (Free vs $1.99) and update cadence (every 2 months vs every 29 months). Pregnancy Timing Chart's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Thermometer Log is free to download; Pregnancy Timing Chart costs $1.99 up front. Thermometer Log sells 1 one-off in-app purchase. Pregnancy Timing Chart asks for nothing beyond the download.

Pregnancy Timing Chart ships an update every 29 months, Thermometer Log every 2 months. The most recent releases landed on October 18, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Pregnancy Timing Chart | Thermometer Log |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/thermometer-log/id1546929547/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 29 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 12 MB | 6 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [俊 姜](https://appshunter.io/developer/974809005) | [Kei Suefuji](https://appshunter.io/developer/1388335881) |

## What reviewers say

### Pregnancy Timing Chart

[App page](https://appshunter.io/ios/app/pregnancy-timing-chart/id1040390446)

This app helps users track their menstrual cycles and identify optimal timing for conception. It utilizes basal body temperature readings and moon phases to predict ovulation, aiming to improve chances of getting pregnant.

**Highlights:** Track periods up to 200 days, Utilize moon phases for cycle tracking, Display Fahrenheit and Celsius temperatures, Predict ovulation based on BBT, Support for multiple system languages

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

**In-app purchases:** none


### Thermometer Log

[App page](https://appshunter.io/ios/app/thermometer-log/id1546929547)

Easily record and track your body temperature with this intuitive app. View historical data, analyze trends with graphs, and export your records. Supports both Celsius and Fahrenheit units.

**Highlights:** Easy temperature recording, Celsius and Fahrenheit support, Weekly, monthly, and 3-month graphs, Average temperature display, Data correction and addition, CSV export

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM | $4.99 | one-time |


## Frequently asked questions

### Is Pregnancy Timing Chart free?

Pregnancy Timing Chart costs $1.99, with no in-app purchases.

### Is Thermometer Log free?

Thermometer Log is free to download, with in-app purchases available.

### Do Pregnancy Timing Chart or Thermometer Log have ads?

Thermometer Log shows ads; Pregnancy Timing Chart does not.

### Which is updated more often, Pregnancy Timing Chart or Thermometer Log?

Pregnancy Timing Chart ships an update every 29 months, and Thermometer Log every 2 months. Most recently, Pregnancy Timing Chart was updated on October 18, 2026 and Thermometer Log on October 10, 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.*