Radiant Grid vs Substrate Entity
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Radiant Grid
A calming puzzle game featuring 99 handcrafted levels with increasing difficulty. Players tap squares to light a path across a grid, following number clues to solve each challenge. Enjoy a soothing soundtrack and a beautiful, minimalist design.
- 99 challenging handcrafted levels
- Mindful and relaxing gameplay
- Ambient soundtrack
- Simple tap controls
- Increasing difficulty curve
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A mindful, relaxing puzzle game with 99 increasingly challenging, handcrafted levels. Simple to play but not so simple to complete! Immerse yourself in the soothing ambient soundtrack and focus on solving the grid. “Quite simply one of the most beautiful puzzle games I have ever played. The design is simple, yet aesthetically pleasing, and the soundtrack is a wonderful sonic wash that perfectly compliments the gameplay. The puzzles themselves are well pitched. The introductory rounds are small enough to lend themselves to both a studied approach or random tapping. They gradually ramp up the difficulty level, and with so many to work through, there is great value for money to be had." - an App Store customer from the UK. How to play: Start at the origin and tap the squares to light a path across the grid. There’s just one rule! The numbers scattered across the grid tell you how many squares you must light up around each one to solve the puzzle… and that’s where the skill comes in!
Substrate Entity
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One row every beat. It forks every beat. You are a charge running an etched plate. The trace splits under you, and some of the branches it offers are already finished. Nothing marks them. You read ahead, you pick a side, you keep moving. Press the left or the right of the glass. That is the whole game. SEVEN STRATA Each one runs faster and darker than the one above it. When the colour turns, the tempo turns with it. CHARGE Every row costs you. The bright pads pay it back and stack your multiplier. The branch that keeps you alive and the branch that keeps you fed are rarely the same branch. NO ADS No timers, no energy, no currency, no in-app purchases, no account. It runs entirely on your phone. Portrait, one thumb. Sound, haptics and motion each turn off. More from Dro1d Labs: Pixel Pigeon for the stubborn life of a city bird, and War Pigeon for tactical stealth after dark. Privacy Policy: https://dro1d.org/substrate.html#privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Substrate Entity at Free against Radiant Grid's $1.99. Substrate Entity also leads on update cadence (every 3 days vs every 6 months). Radiant Grid's advantage is device support (3 vs 1) and iOS requirement (18.6 vs 26.0). On ads and in-app purchases 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
Substrate Entity is free to download; Radiant Grid costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Radiant Grid ships an update every 6 months, Substrate Entity every 3 days. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.
| Parameter | Radiant Grid | Substrate Entity |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.2 (15 ratings) — better | — |
| Positive reviews | 85.0% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 6 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 18.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 53 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Open Planet Software | DRO1D LABS LIMITED |
In-app purchases
Radiant Grid
No in-app purchases
Substrate Entity
No in-app purchases









