# Flex Log vs Truly Simple Symptom Log

The clearest difference is in-app purchases: Flex Log at none against Truly Simple Symptom Log's 1. Flex Log also leads on update cadence (every 5 days vs every 3 weeks) and iOS requirement (12.4 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Truly Simple Symptom Log sells 1 one-off in-app purchase. Flex Log asks for nothing beyond the download.

Flex Log ships an update every 5 days, Truly Simple Symptom Log every 3 weeks. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Flex Log | Truly Simple Symptom Log |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 18 MB | 1 MB |
| Requires iOS | **12.4** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Aaron Larner](https://appshunter.io/developer/950120608) | [Colin Wright](https://appshunter.io/developer/1814828139) |

## What reviewers say

### Flex Log

[App page](https://appshunter.io/ios/app/flex-log/id6476252928)

**Features:** macOS Compatibility

**In-app purchases:** none


### Truly Simple Symptom Log

[App page](https://appshunter.io/ios/app/truly-simple-symptom-log/id6766123526)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $4.99 | one-time |


## Frequently asked questions

### Is Flex Log free?

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

### Is Truly Simple Symptom Log free?

Truly Simple Symptom Log is free to download, with in-app purchases available.

### Do Flex Log or Truly Simple Symptom Log have ads?

Neither Flex Log nor Truly Simple Symptom Log shows ads.

### Which is updated more often, Flex Log or Truly Simple Symptom Log?

Flex Log ships an update every 5 days, and Truly Simple Symptom Log every 3 weeks. Most recently, Flex Log was updated on October 3, 2026 and Truly Simple Symptom Log on October 9, 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.*