SiO Athletica vs Iron Diary
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
SiO Athletica
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Use your phone to book, cancel or enter the waiting list on a group session for your gym. Read news and get an overview of your membership directly from your phone. Mobile Access also gives you easy access to your gym. Have a good workout!
Iron Diary
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Iron Diary is a workout log built for lifters and runners who hate clutter. Track every set, every rep, every run ā then watch your body actually change. STRENGTH TIER SYSTEM Every muscle gets a tier: Beginner, Novice, Intermediate, Advanced, Elite. Bench, squat, deadlift, OHP, row, plus 30+ other lifts including dumbbell variants. Calibrated against published strength standards. Tap any muscle to see your last PR, a 90-day score sparkline, weekly volume, time-to-next-tier estimate, and exercises you haven't tried yet. IRON DIARY WRAPPED A story-style monthly recap of your training ā total volume, biggest PRs, muscles that leveled up, longest streak, and a tier card to share. Auto-prompts at the start of each month. Save and post to TikTok or Instagram. RUNNING + GPS Log runs with live GPS tracking ā distance, pace, duration. Cardio lives alongside strength so your whole week is in one app. PROGRESSION Compare your starting body to today. See which muscles leveled up. Watch your strength score climb week by week. WORKOUT CONTAINERS Workouts are persistent ā Push Day, Pull Day, Legs ā not single dated sessions. Open one, log your sets, close it. The next time you do Push Day, your last weights and reps are right there. No clutter, no calendar gymnastics. EXTRAS ⢠Recovery silhouette ā see which muscles are still fatigued ⢠11 themes including pure black OLED ⢠Rest timer with optional chime ⢠Plate calculator ⢠Body weight + measurement tracking ⢠Warmup sets, supersets, drop sets ⢠JSON export and import for full data portability ⢠Norwegian and English number formats PRIVACY All your training data stays on your phone. No tracking, no ads. Local-first by design. Built solo by a lifter, for the gym floor.
Screenshots
Verdict
The clearest difference is update cadence: Iron Diary at every 6 days against SiO Athletica's every 2 weeks. Iron Diary also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SiO Athletica ships an update every 2 weeks, Iron Diary every 6 days. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.
| Parameter | SiO Athletica | Iron Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 6 days ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.1 ā better |
| Further details ā not scored | ||
| Size | 78 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Studentsamskipnaden i Oslo og Akershus | Even Kofoed |
In-app purchases
SiO Athletica
No in-app purchases
Iron Diary
No in-app purchases
Questions
Is SiO Athletica free?
Is Iron Diary free?
Do SiO Athletica or Iron Diary have ads?
Which is updated more often, SiO Athletica or Iron Diary?
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