Comparison

Voidspace vs ReRuno

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

Head to head
About

Voidspace

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Voidspace is a simple, immersive app for breathing and meditation. Particle visuals that drift like deep space, paired with sound that follows your breath. As the session unfolds, the visuals shift slowly, creating time to turn your attention toward your own breathing. β–  Three breathing methods β–· Natural breathing (inhale 4 seconds, exhale 6 seconds) The simplest breathing rhythm. For everyday relaxation, or a quiet moment before sleep. β–· Box breathing (4-4-4-4) An even cycle of inhale, hold, exhale, hold. For when you want to focus, or settle your mind. β–· 4-7-8 breathing (inhale 4, hold 7, exhale 8) A deep relaxation breath that activates the parasympathetic nervous system. Effective before bed, or when stress feels intense. β–  Session length Choose 1, 3, or 5 minutes, or unlimited. Review your practice with session history and a calendar heatmap. β–  Sound and haptics that follow your breath A synthesized drone shifts with your breathing. In standard sessions, you can enable 40 Hz amplitude modulation. On iPhone, haptics mark each phase change. With Voidspace Plus, you also get a haptic tick every second, and a double tap at each transition. β–  Voidspace Plus β€” one-time purchase Sleep mode moves from the breathing guide into ambient soundβ€”space, rain, or wavesβ€”and fades out gently at the end of your chosen time. Choose 15, 30, or 60 minutes. A black screen and per-second haptic guidance during breathing are also included. Sleep mode and the black screen work while the app stays open. Locking the screen or switching to another app will pause the session. When a session ends, screen wake is released, and the display turns off according to your iPhone Auto-Lock setting. β–  Privacy first No account. No analytics. No ads. Your data stays on your device. β–  Japanese and English The app follows your device language automatically. You can also switch languages manually in the app. β€” Breathing is access to your own stillness, anytime, anywhere. Voidspace is a quiet space for that.

About

ReRuno

Features
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Simple five-minute self-care for runners, matched to how your knee feels today. ReRuno helps recreational runners build a consistent knee-care habit. Choose your current condition and follow a short guided routine with clear movement examples. FIRST THREE SESSIONS FREE Download the app and complete your first three care sessions for free. From the fourth session, unlock unlimited care with a one-time Β₯500 in-app purchase. There is no subscription or auto-renewal. Customers who purchased the previous paid version keep full access at no additional charge. Purchases can be restored from the purchase screen or Settings. FEATURES β€’ Record your knee condition on a four-level scale β€’ View a care routine suited to today's condition β€’ Follow foam roller and clamshell movement guides β€’ Review completed sessions on a calendar β€’ Track streaks and accumulated self-care time β€’ Add a race and view the countdown β€’ Optional daily reminders β€’ Japanese and English interface ReRuno supports self-care habits and does not provide medical diagnosis, treatment, or medical advice. Stop if pain, numbness, or discomfort worsens and consult a qualified healthcare professional when appropriate. No account or login is required. Care records are stored only on your device. Privacy Policy https://gifted-dinner-ede.notion.site/ReRuno-3bab6d152ab280c5bcdbf3c63fd98411

Screenshots

Voidspace4 screens
ReRuno4 screens

Verdict

The call

Voidspace and ReRuno are too close to call on the numbers: across 6 compared parameters β€” price, update cadence, ads and in-app purchases among them β€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

Voidspace ships an update every 2 weeks, ReRuno every 3 weeks. Both last shipped on October 31, 2026.

ScorecardNo meaningful differences
Voidspace versus ReRuno: the parameters behind the verdict, then further details
ParameterVoidspaceReRuno
PriceFreeFree
Update frequencyEvery 2 weeks β€” betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPod β€” betteriPhone
Requires iOS15.0 β€” better16.4
Further details β€” not scored
Size7 MB35 MB
Age rating4+4+
DeveloperKunihiko AyuhaYE YANG

In-app purchases

None

Voidspace

No in-app purchases

None

ReRuno

No in-app purchases

Questions

Is Voidspace free?
Voidspace is free to download, with no in-app purchases.
Is ReRuno free?
ReRuno is free to download, with no in-app purchases.
Do Voidspace or ReRuno have ads?
Neither Voidspace nor ReRuno shows ads.
Which is updated more often, Voidspace or ReRuno?
Voidspace ships an update every 2 weeks, and ReRuno every 3 weeks. Most recently, Voidspace was updated on October 31, 2026 and ReRuno on October 31, 2026.

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