Comparison

Sauna Journal vs Sub20

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sauna Journal

Easily record sauna session details like duration, temperature, and hydration. Understand how regular sauna use improves your well-being, stress levels, and recovery. Offers real-time hydration feedback for safer, more beneficial sessions.

Highlights
  • Record session length
  • Track temperature
  • Monitor hydration levels
  • View health enhancement insights
  • Real-time hydration feedback
  • Progress tracking
Features
Read full description

Sauna Journal is designed for everyone who loves sauna sessions and wants to maximize their benefits. This app allows you to easily record session lengths, temperatures, and hydration levels, providing a clear view of how regular sauna use enhances your health. Understand the impact of sauna on well-being by tracking your progress and noticing improvements in stress reduction, cardiovascular health, and muscle recovery. Sauna Journal emphasizes the importance of hydration, offering real-time feedback to ensure your sessions are both safe and beneficial.

About

Sub20

Features
Read full description

Sub20 is a structured 5K training system that helps you run a faster, stronger 5K, with a clear path all the way to sub-20 if that's your goal. Enter your current 5K time and Sub20 instantly places you at the right starting point: Level 1 - Foundation: 30:00+ Level 2 - Aerobic Build: 27:00-30:00 Level 3 - Threshold Development: 25:00-27:00 Level 4 - 5K Conversion: 23:00-25:00 Level 5 - Race Specific: 21:00-23:00 Level 6 - Sub-20 Peak: under 21:00 - Personalised training levels that adapt to your current ability - Exact paces for every session, so you always know how hard to push - Benchmark tests that track real progress toward your goal time and adjust your training plan if needed - Apple Watch sync - see your session and paces on your wrist, mid-run - Simple, structured weekly plans - no guesswork, no overtraining Download Sub20 and start your next session today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Sauna Journal4 screens
Sub204 screens

Verdict

The call

The clearest difference is in-app purchases: Sauna Journal at none against Sub20's 1. Sub20's advantage is update cadence (every 3 days vs weekly) and device support (4 vs 1). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sub20 sells 1 in-app purchase, starting at $24.99 per month. Sauna Journal asks for nothing beyond the download.

UpkeepUpdate frequency

Sauna Journal ships an update weekly, Sub20 every 3 days. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 6 level
Sauna Journal versus Sub20: the parameters behind the verdict, then further details
ParameterSauna JournalSub20
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.015.0 — better
Further details — not scored
Size2 MB10 MB
Age rating4+4+
DeveloperNucleon ASChris Edgar

In-app purchases

None

Sauna Journal

No in-app purchases

1 purchases

Sub20

Subscriptions1
  • Sub20 Monthly7 Days trial$24.991 Month

Questions

Is Sauna Journal free?
Sauna Journal is free to download, with no in-app purchases.
Is Sub20 free?
Sub20 is free to download, with in-app purchases available.
Do Sauna Journal or Sub20 have ads?
Neither Sauna Journal nor Sub20 shows ads.
Which is updated more often, Sauna Journal or Sub20?
Sauna Journal ships an update weekly, and Sub20 every 3 days. Most recently, Sauna Journal was updated on October 7, 2026 and Sub20 on October 14, 2026.

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