Comparison

Relativistic Space vs Ask Lyra

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

Head to head
About

Relativistic Space

This educational tool simulates the behavior of space and time at high speeds. Developed as part of a master's dissertation, it focuses on relativistic effects without considering acceleration.

Highlights
  • Relativistic velocity simulation
  • Space-time behavior visualization
  • Pedagogical tool
  • Master's dissertation project
Features
Read full description

This simple simulator shows how space and time behave at relativistic velocities. It was developed as a pedagogical tool as part of a master's dissertation at the Federal University of Espírito Santo. Thus, it does not take into account the acceleration effects of the spacecraft. It was developed in a partnership between Prof Thiéberson Gomes (UFES), Prof Flávio Gimenes (UFES) and student Luiz Henrique Gobbi, with computational support Rodrigo Marques.

About

Ask Lyra

Features
Read full description

Ask Lyra: The Math Engine From Algebra homework to university-level proofs — Lyra is the AI math tutor built for serious students. Most "math AI" apps spit out an answer and call it a day. Lyra is different. She's a dual-engine math tutor: a fast Standard Engine for everyday Algebra, Geometry, and Trigonometry, and a high-rigor Undergrad Engine that switches on automatically when you tackle Calculus, Linear Algebra, or formal proofs. You get the right tool for the right problem, every time. SNAP & STUDY Point your camera at any worksheet, textbook problem, or test review. Lyra reads it, identifies the topic, and walks you through every step — no skipped logic, no hand-waving. TWO ENGINES, ONE TUTOR • Standard Engine — Lightning-fast help for Algebra 1/2, Geometry, basic stats, and unit conversions. • Undergrad Engine — Activates automatically for Limits, Derivatives, Integrals, Linear Algebra, Differential Equations, and "Prove that…" problems. Formal notation, cited theorems, full rigor. LYRA'S VAULT Save every solved assignment and one-on-one lesson to your personal vault, organized by subject — AP Calc AB, Statistics, Trigonometry, Algebra, and more. Revisit any solution, or ask Lyra to build you a custom practice lesson modeled on the questions you struggled with. ONE-ON-ONE LESSONS Chat with Lyra for as long as you need. Ask follow-up questions, request a different approach, or have her teach a concept from the ground up. Save any lesson straight to your vault for later review. BUILT FOR HIGH SCHOOL & COLLEGE • Pre-Algebra · Algebra 1 & 2 · Geometry · Trigonometry • Pre-Calculus · AP Calculus AB/BC · Statistics • Linear Algebra · Differential Equations · Discrete Math • Formal proofs with LaTeX-rendered notation Apple's End User License Agreement (EULA) applies and is located at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Relativistic Space4 screens
Ask Lyra4 screens

Verdict

The call

The clearest difference is in-app purchases: Relativistic Space at none against Ask Lyra's 7. Relativistic Space also leads on iOS requirement (13.0 vs 18.0). Ask Lyra's advantage is update cadence (every 3 months vs every 75 months). On price, ads and device support 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. Ask Lyra sells 7 in-app purchases, starting at $4.99 per 7 days. Relativistic Space asks for nothing beyond the download.

UpkeepUpdate frequency

Relativistic Space ships an update every 75 months, Ask Lyra every 3 months. Both last shipped on October 7, 2026.

Scorecard3 real differences · 7 level
Relativistic Space versus Ask Lyra: the parameters behind the verdict, then further details
ParameterRelativistic SpaceAsk Lyra
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 75 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size52 MB19 MB
Age rating4+4+
DeveloperThieberson GomesAtkins Media, LLC

In-app purchases

None

Relativistic Space

No in-app purchases

7 purchases

Ask Lyra

Subscriptions4
  • Ask Lyra Weekly Pro3 Days trial$4.997 Days
  • Ask Lyra Monthly Pro3 Days trial$14.991 Month
  • Ask Lyra Semester Pro3 Days trial$34.993 Months
Show 1 more
  • Ask Lyra Annual Pro3 Days trial$79.991 Year
One-time3
  • Spark — 5 Fire Ups$4.99
  • Blaze — 15 Fire Ups$12.99
  • Inferno — 40 Fire Ups$29.99

Questions

Is Relativistic Space free?
Relativistic Space is free to download, with no in-app purchases.
Is Ask Lyra free?
Ask Lyra is free to download, with in-app purchases available.
Do Relativistic Space or Ask Lyra have ads?
Neither Relativistic Space nor Ask Lyra shows ads.
Which is updated more often, Relativistic Space or Ask Lyra?
Relativistic Space ships an update every 75 months, and Ask Lyra every 3 months. Most recently, Relativistic Space was updated on October 7, 2026 and Ask Lyra on October 7, 2026.

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